<!-- Release History -->
-<h2 id="Releases">Release History</h2>
+<p>This page summarizes the changes between official stable releases of Go.
+Between releases we issue less stable
+<a href="http://blog.golang.org/2011/03/go-becomes-more-stable.html">weekly snapshots</a>.
+The <a href="weekly.html">weekly snapshot history</a> contains more detail,
+and the <a href="http://code.google.com/p/go/source/list">Mercurial change log</a>
+has full details.</p>
-<p>This page summarizes the changes between tagged releases of Go.
-For full details, see the <a href="http://code.google.com/p/go/source/list">Mercurial change log</a>.</p>
-
-<h3 id="2011-04-27">2011-04-27</h3>
+<p>To update to a specific release, use:</p>
<pre>
-This release includes revisions to the reflect package to make it more
-efficient, after last the weekly’s major API update. If your code uses reflect
-it may require further changes, not all of which can be made automatically by
-gofix. For the full details of the change, see
- http://codereview.appspot.com/4435042
-Also, the Typeof and NewValue functions have been renamed to TypeOf and ValueOf.
-
-Other changes:
-* 5c: make alignment rules match 5g, just like 6c matches 6g.
-* 8g, 8l: fix "set but not used" gcc error (thanks Fazlul Shahriar).
-* all-qemu.bash: remove DISABLE_NET_TESTS.
-* build: remove DISABLE_NET_TESTS.
-* builder: build multiple targets in parallel.
-* cgo: avoid "incompatible pointer type" warning (thanks Albert Strasheim).
-* codereview: add 'hg undo' command, various other fixes.
-* compress/flate: dictionary support.
-* compress/zlib: add FDICT flag in Reader/Writer (thanks Ross Light).
-* container/heap: fix circular dependency in test.
-* crypto/openpgp: better handling of keyrings.
-* crypto/rsa: support > 3 primes.
-* crypto/tls: add server-side OCSP stapling support.
-* crypto/x509: memorize chain building.
-* crypto: move certificate verification into x509.
-* dashboard: build most recent revision first.
-* doc: mention make version in install.html.
-* expvar: add Func for functions that return values that are JSON marshalable.
-* fmt: decrease recursion depth in tests to permit them to run under gccgo,
- tweak the doc for %U.
-* gc: allow complex types to be receiver types (thanks Robert Hencke),
- correct handling of unexported method names in embedded interfaces,
- explain why invalid receiver types are invalid,
- fix copy([]int, string) error message (thanks Quan Yong Zhai),
- fix 'invalid recursive type' error (thanks Lorenzo Stoakes),
- many bug fixes.
-* go spec: attempt at clarifying language for "append",
- for map types, mention indexing operations.
-* go/types: update for export data format change.
-* gob: fix handling of indirect receivers for GobDecoders,
- fix trivial bug in map marshaling,
- have errorf always prefix the message with "gob: ",
- test case for indirection to large field,
- use new Implements and AssignableTo methods in reflect,
- when decoding a string, allocate a string, not a []byte.
-* gobuilder: permit builders of the form goos-goarch-foo,
- respect MAKEFLAGS if provided (thanks Dave Cheney).
-* godoc: use "search" input type for search box (thanks Dmitry Chestnykh).
-* gofix: add support for reflect rename.
-* gofmt: add -d (diff) (thanks David Crawshaw),
- don't crash when rewriting nil interfaces in AST,
- exclude test case that doesn't compile w/o errors,
- gofmt test harness bug fix.
-* goinstall: support GOPATH; building and installing outside the Go tree,
- support building executable commands.
-* gopack: fix prefix bug,
- preserve safe flag when not adding unsafe objects to archive.
-* gotest: add timing, respect $GOARCH,
- generate gofmt-compliant code.
-* http/cgi: copy some PATH environment variables to child,
- improve Location response handling,
- pass some default environment variables.
-* http/fcgi: new package (thanks Evan Shaw).
-* http: add NewRequest helper,
- add MultipartForm, ParseMultipartForm, and FormFile to Request,
- be clear when failing to connect to a proxy,
- bug fixes and new tests,
- consume request bodies before replying,
- don't quote Set-Cookie Domain and Path (thanks Petar Maymounkov),
- fix IP confusion in TestServerTimeouts,
- handler timeout support,
- ServerConn, ClientConn: add real Close (thanks Petar Maymounkov),
- make Client redirect policy configurable,
- put a limit on POST size,
- reverse proxy handler.
-* image/jpeg: add an encoder,
- decode to a YCbCr image instead of an RGBA image.
-* ioutil: add Discard.
-* json: keep track of error offset in SyntaxError.
-* ld: defend against some broken object files,
- do not emit empty dwarf pe sections (thanks Alex Brainman),
- fix 6l -d on Mac, diagnose invalid use of -d,
- fix Plan 9 symbol table (thanks Anthony Martin),
- remove MachoLoad limit.
-* make: prevent rm provoking 'text file busy' errors (thanks Lorenzo Stoakes).
-* mime/multipart: add ReadForm for parsing multipart forms,
- limit line length to prevent abuse.
-* mime: RFC 2231 continuation / non-ASCII support,
- bunch more tests, few minor parsing fixes.
-* misc/goplay: fix Tab and Shift+Enter in Firefox (thanks Dmitry Chestnykh).
-* net: disable one more external network test,
- fix EAI_BADFLAGS error on freebsd (thanks Mikio Hara),
- fix ParseIP (thanks Quan Yong Zhai),
- fix dialgoogle_test.go (thanks Quan Yong Zhai),
- try /etc/hosts before loading DNS config (thanks Dmitry Chestnykh),
- use C library resolver on FreeBSD, Linux, OS X / amd64, 386.
-* os/user: new package to look up users.
-* os: Open with O_APPEND|O_CREATE to append on Windows (thanks Alex Brainman),
- fix race in ReadAt/WriteAt on Windows (thanks Alex Brainman),
- turn EPIPE exit into panic.
-* rc/env.bash: fix to build on windows under msys (thanks Joe Poirier).
-* reflect: allow Slice of arrays,
- fix Copy of arrays (thanks Gustavo Niemeyer),
- require package qualifiers to match during interface check,
- add Type.Implements, Type.AssignableTo, Value.CallSlice,
- make Set match Go.
-* rpc: allow the first argument of a method to be a value rather than a pointer,
- run benchmarks over HTTP as well as direct network connections.
-* run.bash: remove redundant rebuilds.
-* runtime/plan9: warning remediation for Plan 9 (thanks Lucio De Re),
-* runtime: many bug fixes,
- fix GOMAXPROCS vs garbage collection bug (thanks Dmitriy Vyukov),
- fix mkversion to output valid path separators (thanks Peter Mundy),
- more graceful out-of-memory crash,
- require package qualifiers to match during interface check,
- skip functions with no lines when building src line table,
- turn "too many EPIPE" into real SIGPIPE.
-* src/pkg: make package doc comments consistently start with "Package foo".
-* syscall: Madvise and Mprotect for Linux (thanks Albert Strasheim),
- Mlock, Munlock, Mlockall, Munlockall on Linux (thanks Albert Strasheim),
- add BPF support for darwin/386, darwin/amd64 (thanks Mikio Hara),
- correct Windows CreateProcess input parameters (thanks Alex Brainman),
- fix Ftruncate under linux/arm5 (thanks Dave Cheney),
- permit StartProcess to hide the executed program on windows (thanks Vincent Vanackere).
-* test/bench: update timings; moving to new machine.
-* time: support Irix 6 location for zoneinfo files.
-* tutorial: modernize the definition and use of Open,
- replace the forever loops with finite counts in sieve programs.
-* websocket: include *http.Request in websocket.Conn.
-* xml: Parser hook for non-UTF-8 charset converters.
+hg pull
+hg update release.r<i>NN</i>
</pre>
-<h3 id="2011-04-13">2011-04-13</h3>
-
-<pre>
-weekly.2011-04-13
-
-This weekly snapshot includes major changes to the reflect package and the
-os.Open function. Code that uses reflect or os.Open will require updating,
-which can be done mechanically using the gofix tool.
-
-The reflect package's Type and Value types have changed. Type is now an
-interface that implements all the possible type methods. Instead of a type
-switch on a reflect.Type t, switch on t.Kind(). Value is now a struct value
-that implements all the possible value methods. Instead of a type switch on a
-reflect.Value v, switch on v.Kind(). See the change for the full details:
- http://code.google.com/p/go/source/detail?r=843855f3c026
+<h2 id="r57">r57 (released 2011/05/03)</h2>
-The os package's Open function has been replaced by three functions:
- OpenFile(name, flag, perm) // same as old Open
- Open(name) // same as old Open(name, O_RDONLY, 0)
- Create(name) // same as old Open(name, O_RDWR|O_TRUNC|O_CREAT, 0666)
+<p>
+The r57 release corresponds to
+<code><a href="weekly.html#2011-04-27">weekly.2011-04-27</a></code>
+with additional bug fixes.
+This section highlights the most significant changes in this release.
+For a more detailed summary, see the
+The <a href="weekly.html#2011-04-27">weekly release notes</a>.
+For complete information, see the
+<a href="http://code.google.com/p/go/source/list?r=release-branch.r57">Mercurial change list</a>.
+</p>
-To update your code to use the new APIs, run "gofix path/to/code". Gofix can’t
+<p>The new <a href="/cmd/gofix">gofix</a> tool finds Go programs that use old APIs and rewrites them to use
+newer ones. After you update to a new Go release, gofix helps make the
+necessary changes to your programs. Gofix will handle the http, os, and syscall
+package changes described below, and we will update the program to keep up with
+future changes to the libraries.
+Gofix can’t
handle all situations perfectly, so read and test the changes it makes before
committing them.
+See <a href="http://blog.golang.org/2011/04/introducing-gofix.html">the gofix blog post</a> for more
+information.</p>
-Other changes:
-* archive/zip: add func OpenReader, type ReadCloser (thanks Dmitry Chestnykh).
-* asn1: Implement correct marshaling of length octets (thanks Luit van Drongelen).
-* big: don't crash when printing nil ints.
-* bufio: add ReadLine, to replace encoding/line.
-* build: make the build faster, quieter.
-* codereview: automatically port old diffs forward,
- drop Author: line on self-clpatch,
- recognize code URL without trailing slash.
-* crypto/block: remove deprecated package.
-* crypto/des: new package implementating DES and TDEA (thanks Yasuhiro Matsumoto).
-* crypto/ecdsa, crypto/rsa: use io.ReadFull to read from random source (thanks Dmitry Chestnykh).
-* crypto/rsa: add 3-prime support,
- add support for precomputing CRT values,
- flip the CRT code over so that it matches PKCS#1.
-* crypto/x509: expose complete DER data (thanks Mikkel Krautz).
-* doc: new "Functions" codewalk (thanks John DeNero).
-* doc/roadmap: add sections on tools, packages.
-* fmt: allow %U for unsigned integers.
-* gc: fixes and optimizations.
-* go/printer, gofmt: use blank to separate import rename from import path.
-* go/scanner: better TokenString output.
-* go/types: new Go type hierarchy implementation for AST.
-* godashboard: show packages at launchpad.net (thanks Gustavo Niemeyer).
-* gofix: add -diff, various fixes and helpers.
-* gotest: fix a bug in error handling,
- fixes for [^.]_test file pattern (thanks Peter Mundy),
- handle \r\n returned by gomake on Windows (thanks Alex Brainman).
-* gotype: use go/types GcImporter.
-* govet: make name-matching for printf etc. case-insensitive.
-* http: allow override of Content-Type for ServeFile,
- client gzip support,
- do not listen on 0.0.0.0 during test,
- flesh out server Expect handling + tests.
-* image/ycbcr: new package.
-* image: allow "?" wildcards when registering image formats.
-* io: fixes for Read with n > 0, os.EOF (thanks Robert Hencke).
-* ld: correct Plan 9 compiler warnings (thanks Lucio De Re),
- ELF header function declarations (thanks Lucio De Re),
- fix Mach-O X86_64_RELOC_SIGNED relocations (thanks Mikkel Krautz),
- fix Mach-O bss bug (thanks Mikkel Krautz),
- fix dwarf decoding of strings for struct's fieldnames (thanks Luuk van Dijk),
- fixes and optimizations (25% faster).
-* log: generalize getting and setting flags and prefix.
-* misc/cgo/life: enable build and test on Windows (thanks Alex Brainman).
-* misc/vim: add plugin with Fmt command (thanks Dmitry Chestnykh),
- update type highlighting for new reflect package.
-* net: disable multicast tests by default (thanks Dave Cheney),
- sort records returned by LookupMX (thanks Corey Thomasson).
-* openpgp: Fix improper := shadowing (thanks Gustavo Niemeyer).
-* os: rename Open to OpenFile, add new Open, Create,
- fix Readdir in Plan 9 (thanks Fazlul Shahriar).
-* os/inotify: use _test for test files, not _obj.
-* pkg/path: enable tests on Windows (thanks Alex Brainman).
-* reflect: new Type and Value API.
-* src/pkg/Makefile: trim per-directory make output except on failure.
-* syscall: Add DT_* and MADV_* constants on Linux (thanks Albert Strasheim),
- add Mmap, Munmap on Linux, FreeBSD, OS X,
- fix StartProcess in Plan 9 (thanks Fazlul Shahriar),
- fix Windows Signaled (thanks Alex Brainman).
-* test/bench: enable build and test on Windows (thanks Alex Brainman).
-</pre>
-
-<h3 id="2011-04-04">2011-04-04</h3>
-
-<pre>
-This release includes changes to the net package. Your code will require
-changes if it uses the Dial or LookupHost functions.
-
-The laddr argument has been removed from net.Dial, and the cname return value
-has been removed from net.LookupHost. The new net.LookupCNAME function can be
-used to find the canonical host for a given name. You can update your
-networking code with gofix.
-
-The gotest shell script has been replaced by a Go program, making testing
-significantly faster.
-
-Other changes:
-* asn1: extensions needed for parsing Kerberos.
-* bufio: Write and WriteString cleanup (thanks Evan Shaw).
-* bytes, strings: simplify Join (thanks Evan Shaw).
-* crypto/cipher: bad CTR IV length now triggers panic.
-* crypto/tls: extend NPN support to the client,
- added X509KeyPair function to parse a Certificate from memory.
-* crypto/x509: parse Extended Key Usage extension (thanks Mikkel Krautz).
-* debug/gosym: remove need for gotest to run preparatory commands.
-* fmt: implement precision (length of input) values for %q: %.20q.
-* go/parser: fix scoping for local type declarations (thanks Roger Peppe),
- package name must not be the blank identifier.
-* go/printer, gofmt: remove special case for multi-line raw strings.
-* gopack: add P flag to remove prefix from filename information.
-* gotest: add -test.timeout option,
- replace the shell script with the compiled program written in go,
- execute gomake properly on Windows (thanks Alex Brainman).
-* gotry: move into its own directory, separate from gotest.
-* gotype: support for more tests, added one new test.
-* http: add Transport.MaxIdleConnsPerHost,
- use upper case hex in URL escaping (thanks Matt Jones).
-* httptest: add NewTLSServer.
-* misc/kate: reorganize, remove closed() (thanks Evan Shaw).
-* misc/notepadplus: support for notepad++ (thanks Anthony Starks).
-* net: implement non-blocking connect (thanks Alexey Borzenkov).
-* os: fix MkdirAll("/thisdoesnotexist") (thanks Albert Strasheim),
- Plan 9 support (thanks Yuval Pavel Zholkover),
- add a few missing Plan 9 errors (thanks Andrey Mirtchovski),
- fix FileInfo.Name returned by Stat (thanks David Forsythe).
-* path/filepath.Glob: add an error return,
- don't drop known matches on error.
-* path/filepath: add support for Plan 9 (thanks Andrey Mirtchovski).
-* scanner: treat line comments like in Go.
-* syscall: Plan 9 support (thanks Yuval Pavel Zholkover),
- StartProcess Chroot and Credential (thanks Albert Strasheim),
- add BPF support for freebsd/386, freebsd/amd64 (thanks Mikio Hara),
- make [Raw]Syscall6 pass 6th arg on linux/386 (thanks Evan Shaw).
-</pre>
-
-<h3 id="2011-03-28">2011-03-28</h3>
-
-<pre>
-This weekly release includes improved support for testing.
-
-Memory and CPU profiling is now available via the gotest tool. Gotest will
-produce memory and CPU profiling data when invoked with the -test.memprofile
-and -test.cpuprofile flags. Run "godoc gotest" for details.
-
-We have also introduced a way for tests to run quickly when an exhaustive test
-is unnecessary. Gotest’s new -test.short flag in combination with the testing
-package’s new Short function allows you to write tests that can be run in
-normal or "short" mode; short mode is now used by all.bash to reduce
-installation time.
-The Makefiles know about the flag - you can just run "make testshort".
-
-Other changes:
-* .hgignore: Ignore all goinstalled packages (thanks Evan Shaw).
-* build: add all-qemu.bash, handful of arm fixes,
- add support for SWIG, and add two SWIG examples,
- diagnose Ubuntu's buggy copy of gold,
- handle broken awk in version.bash (thanks Dave Cheney),
- reenable clean.bash without gomake (thanks Gustavo Niemeyer).
-* cgo: fix index-out-of-bounds bug.
-* codereview: permit CLs of the form weekly.DATE
-* crypto/ecdsa: truncate hash values.
-* crypto/openpgp: add DSA signature support.
-* dashboard: remove old python/bash builder, update README.
-* doc: explain release and weekly tags in install.html.
-* exec: document dir option for Run (thanks Gustavo Niemeyer).
-* flag: document Nflag function (thanks Fazlul Shahriar).
-* gc: remove interim ... error which rejects valid code.
-* go/ast: implemented NewPackage,
- merge CaseClause and TypeCaseClause.
-* go/parser: fix memory leak by making a copy of token literals,
- resolve identifiers properly.
-* go/printer, gofmt: avoid exponential layout algorithm,
- gofmt: simplify struct formatting and respect line breaks.
-* go/scanner: to interpret line comments with Windows filenames (thanks Alex Brainman).
-* go/token: use array instead of map for token->string table.
-* gob: optimizations to reduce allocations,
- use pointers in bootstrapType so interfaces behave properly.
-* gobuilder: recognize CLs of the form weekly.DATE.
-* godefs: handle volatile.
-* godoc: add -template flag to specify custom templates,
- fix path problem for windows (thanks Yasuhiro Matsumoto).
-* gofix: httpserver - rewrite rw.SetHeader to rw.Header.Set.
-* gofmt: add profiling flag.
-* gopprof: fix bug: do not rotate 180 degrees for large scrolls,
- update list of memory allocation functions.
-* gotest: fix gofmt issue in generated _testmain.go.
-* http: add NewProxyClientConn,
- avoid crash when asked for multiple file ranges,
- don't chunk 304 responses,
- export Transport, add keep-alive support.
-* ld: return > 0 exit code on unsafe import.
-* misc/bbedit: remove closed keyword (thanks Anthony Starks).
-* misc/emacs: gofmt: don't clobber the current buffer on failure.
-* misc/vim: remove 'closed' as a builtin function.
-* net: add FileConn, FilePacketConn, FileListener (thanks Albert Strasheim),
- don't force epoll/kqueue to wake up in order to add new events,
- let OS-specific AddFD routine wake up polling thread,
- use preallocated buffer for epoll and kqueue/kevent.
-* path/filepath: add EvalSymlinks function,
- fix TestEvalSymlinks when run under symlinked GOROOT.
-* path: work for windows (thanks Yasuhiro Matsumoto).
-* rpc: increase server_test timeout (thanks Gustavo Niemeyer),
- optimizations to reduce allocations.
-* runtime: fix darwin/amd64 thread VM footprint (thanks Alexey Borzenkov),
- fix gdb support for goroutines,
- more stack split fixes,
- os-specific types and code for setitimer,
- update defs.h for freebsd-386 (thanks Devon H. O'Dell).
-* strings: Map: avoid allocation when string is unchanged.
-* syscall: GetsockoptInt (thanks Albert Strasheim),
- StartProcess fixes for windows (thanks Alex Brainman),
- permit non-blocking syscalls,
- rename from .sh to .pl, because these files are in Perl.
-* test: enable tests using v, ok := <-ch syntax (thanks Robert Hencke).
-* time: give a helpful message when we can't set the time zone for testing.
- isolate syscall reference in sys.go.
-</pre>
+<h3 id="r57.lang">Language</h3>
-<h3 id="2011-03-15">2011-03-15</h3>
+<p>
+<a href="/doc/go_spec.html#Receive_operator">Multiple assignment syntax</a> replaces the <code>closed</code> function.
+The syntax for channel
+receives allows an optional second assigned value, a boolean value
+indicating whether the channel is closed. This code:
+</p>
<pre>
-This week's release introduces a new release tagging scheme. We intend to
-continue with our weekly releases, but have renamed the existing tags from
-"release" to "weekly". The "release" tag will now be applied to one hand-picked
-stable release each month or two.
-
-The revision formerly tagged "release.2011-03-07.1" (now "weekly.2011-03-07.1")
-has been nominated our first stable release, and has been given the tag
-"release.r56". As we tag each stable release we will post an announcement to
-the new golang-announce mailing list:
- http://groups.google.com/group/golang-announce
-
-You can continue to keep your Go installation updated using "hg update
-release", but now you should only need to update once we tag a new stable
-release, which we will announce here. If you wish to stay at the leading edge,
-you should switch to the weekly tag with "hg update weekly".
-
-
-This weekly release includes significant changes to the language spec and the
-http, os, and syscall packages. Your code may need to be changed. It also
-introduces the new gofix tool.
-
-The closed function has been removed from the language. The syntax for channel
-receives has been changed to return an optional second value, a boolean value
-indicating whether the channel is closed. This code:
- v := <-ch
+ v := <-ch
if closed(ch) {
// channel is closed
}
-should now be written as:
- v, ok := <-ch
- if !ok {
- // channel is closed
- }
-
-It is now illegal to declare unused labels, just as it is illegal to declare
-unused local variables.
-
-The new gofix tool finds Go programs that use old APIs and rewrites them to use
-newer ones. After you update to a new Go release, gofix helps make the
-necessary changes to your programs. Gofix will handle the http, os, and syscall
-package changes described below, and we will update the program to keep up with
-future changes to the libraries.
-
-The Hijack and Flush methods have been removed from the http.ResponseWriter
-interface and are accessible via the new http.Hijacker and http.Flusher
-interfaces. The RemoteAddr and UsingTLS methods have been moved from
-http.ResponseWriter to http.Request.
-
-The http.ResponseWriter interface's SetHeader method has been replaced by a
-Header() method that returns the response's http.Header. Caller code needs to
-change. This code:
- rw.SetHeader("Content-Type", "text/plain")
-should now be written as:
- rw.Header().Set("Content-Type", "text/plain")
-The os and syscall packages' StartProcess functions now take their final three
-arguments as an *os.ProcAttr and *syscall.ProcAttr values, respectively. This
-code:
- os.StartProcess(bin, args, env, dir, fds)
-should now be written as:
- os.StartProcess(bin, args, &os.ProcAttr{Files: fds, Dir: dir, Env: env})
-
-The gob package will now encode and decode values of types that implement the
-gob.GobEncoder and gob.GobDecoder interfaces. This allows types with unexported
-fields to transmit self-consistent descriptions; one instance is big.Int and
-big.Rat.
-
-Other changes:
-* 5l, 6l, 8l: reduce binary size about 40% by omitting symbols for type, string, go.string.
-* 5l, 8l: output missing section symbols (thanks Anthony Martin).
-* 6l, 8l: fix gdb crash.
-* Make.cmd: also clean _test* (thanks Gustavo Niemeyer).
-* big: implemented custom Gob(En/De)coder for Int type.
-* build: remove duplicate dependency in Make.cmd (thanks Robert Hencke),
- run gotest in misc/cgo/test.
-* codereview.py: don't suggest change -d if user is not CL author (thanks Robert Hencke).
-* compress/lzw: benchmark a range of input sizes.
-* crypto/ecdsa: add package.
-* crypto/elliptic: add the N value of each curve.
-* crypto/openpgp: bug fixes and fix misnamed function.
-* crypto/tls: fix compile error (thanks Dave Cheney).
-* doc: Effective Go: some small cleanups,
- update FAQ. hello, world is now 1.1MB, down from 1.8MB,
- update codelab wiki to fix template.Execute argument order.
-* flag: visit the flags in sorted order, for nicer messages.
-* fmt: do not export EOF = -1.
-* fmt: make ScanState.Token more general (thanks Roger Peppe).
-* gc: diagnose unused labels,
- fix handling of return values named _,
- include all dependencies in export metadata,
- make unsafe.Pointer its own kind of type, instead of an equivalent to *any.
-* go/ast, go/parser: populate identifier scopes at parse time.
-* go/ast: add FileSet parameter to ast.Print and ast.Fprint.
-* go/parser: first constant in a constant declaration must have a value.
-* gob: efficiency and reliability fixes.
-* gofmt: remove -trace and -ast flags.
-* goinstall: handle $(GOOS) and $(GOARCH) in filenames,
- handle .c files with gc when cgo isn't used, and
- handle .s files with gc (thanks Gustavo Niemeyer).
-* gopack: omit time stamps, makes output deterministic.
-* gotype: commandline tool to typecheck go programs.
-* govet: handle '*' in print format strings.
-* hash: new FNV-1a implementation (thanks Pascal S. de Kloe).
-* http/cgi: child support (e.g. Go CGI under Apache).
-* http: adapt Cookie code to follow IETF draft (thanks Petar Maymounkov),
- add test for fixed HTTP/1.0 keep-alive issue,
- don't hit external network in client_test.go,
- fix transport crash when request URL is nil,
- rename interface Transport to RoundTripper,
- run tests even with DISABLE_NET_TESTS=1.
-* httptest: default the Recorder status code to 200 on a Write.
-* io/ioutil: clean-up of ReadAll and ReadFile.
-* ioutil: add NopCloser.
-* ld: preserve symbol sizes during data layout.
-* lib9, libmach: Change GOOS references to GOHOSTOS (thanks Evan Shaw).
-* libmach: correct string comparison to revive 6cov on darwin (thanks Dave Cheney).
-* misc/vim: Add indent script for Vim (thanks Ross Light).
-* net, os, syslog: fixes for Solaris support.
-* net: don't loop to drain wakeup pipe.
-* nm: document -S flag.
-* openpgp: add PublicKey KeyId string accessors.
-* rpc: optimizations, add benchmarks and memory profiling,
- use httptest.Server for tests (thanks Robert Hencke).
-* runtime: reduce lock contention via wakeup on scheduler unlock,
- scheduler, cgo reorganization,
- split non-debugging malloc interface out of debug.go into mem.go.
-* spec: clarify return statement rules.
-* strings: add IndexRune tests, ASCII fast path,
- better benchmark names; add BenchmarkIndex.
-* syscall: implement Mount and Unmount for linux,
- implement Reboot for linux.
-* time: fix Time.ZoneOffset documentation (thanks Peter Mundy).
-* tls: move PeerCertificates to ConnectionState.
-</pre>
-
-<h3 id="2011-03-07">2011-03-07 (r56)</h3>
-
-<pre>
-This release includes changes to the reflect and path packages.
-Code that uses reflect or path may need to be updated.
-
-The reflect package's Value.Addr method has been renamed to Value.UnsafeAddr.
-Code that uses the Addr method will have to call UnsafeAddr instead.
-
-The path package has been split into two packages: path and path/filepath.
-Package path manipulates slash-separated paths, regardless of operating system.
-Package filepath implements the local operating system's native file paths.
-OS-specific functioanlity in pacakge path, such as Walk, moved to filepath.
-
-Other changes:
-* build: fixes and simplifications (thanks Dave Cheney),
- move $GOBIN ahead of /bin, /usr/bin in build $PATH.
-* bzip2: speed up decompression.
-* cgo: fix dwarf type parsing (thanks Gustavo Niemeyer),
- put temporary source files in _obj (thanks Roger Peppe),
- fix bug involving 0-argument callbacks.
-* compress/lzw: optimizations.
-* doc: add FAQ about "implements",
- add FAQ about large binaries ,
- add FAQ about stack vs heap allocation,
- add internationalization to roadmap,
- describe platform-specific conventions in code.html.
-* fmt: allow recursive calls to Fscan etc (thanks Roger Peppe),
- make %#p suppress leading 0x.
-* gc, gopack: add some missing flags to the docs.
-* gc: fix init of packages named main (thanks Gustavo Niemeyer),
-* gob: make recursive map and slice types work, and other fixes.
- tentative support for GobEncoder/GobDecoder interfaces.
-* gobuilder: add -package flag to build external packages and -v for verbose.
-* gofmt: exclude test file that is not legal Go.
-* goinstall: protect against malicious filenames (thanks Roger Peppe).
-* goyacc: provide -p flag to set prefix for names, documentation update.
-* http: add cookie support (thanks Petar Maymounkov),
- allow handlers to send non-chunked responses,
- export ParseHTTPVersion,
- expose Client's Transport,
- use WriteProxy,
- rename ClientTransport to Transport.
-* http/cgi: new package.
-* http/httptest: new package.
-* image: add a decoding test for common file formats.
-* io/ioutil: add TempDir.
-* mime/multipart: Header changed from map to MIMEHeader
-* path/filepath: new OS-specific path support (thanks Gustavo Niemeyer).
-* reflect: add PtrTo, add Value.Addr (old Addr is now UnsafeAddr).
-* runtime: use kernel-supplied compare-and-swap on linux/arm.
-* spec: minor clarification of scope rule for functions.
-* sync/atomic: new package to expose atomic operations.
-* syscall: regenerate zerrors_freebsd_amd64.go (thanks Mikio Hara),
- work around FreeBSD execve kernel bug (thanks Devon H. O'Dell).
-* template: document the delimiters.
-* testing: run GC before each benchmark run (thanks Roger Peppe).
-* unsafe: fix the documentation.
-* websocket: use httptest.Server for tests (thanks Robert Hencke).
-* xml: permit nested directives (thanks Chris Dollin).
-</pre>
-
-<h3 id="2011-02-24">2011-02-24</h3>
-
-<pre>
-This release includes changes to the http package and a small language change.
-Your code will require changes if it manipulates http Headers or omits the
-condition in if statements.
-
-The new http.Header type replaces map[string]string in the Header and Trailer
-fields of http.Request and http.Response.
-A Header value can be manipulated via its Get, Set, Add, and Del methods.
-See http://golang.org/pkg/http/#Header
-
-The condition is now mandatory in if statements.
-Previously it would default to true, as in switch and for statements.
-This code is now illegal:
- if x := foo(); {
- // code that is always executed
- }
-The same effect can be achieved like this:
- if x := foo(); true {
- // code
- }
-Or, in a simpler form:
- {
- x := foo()
- // code
- }
-
-Other changes:
-* 6l: new -Hwindowsgui flag allows to build windows gui pe (thanks Alex Brainman),
- pe fixes (thanks Wei Guangjing).
-* 8l, 6l: allow for more os threads to be created on Windows (thanks Alex Brainman),
-* build: reduce the use of subshells in recursive make, and
- remove unused NaCl conditional from make.bash (thanks Dave Cheney).
-* codereview: fix clpatch with empty diffs (thanks Gustavo Niemeyer).
-* compress/bzip2: add package.
-* compress/lzw: implement a decoder.
-* crypto/openpgp: add package.
-* crypto/rand: add read buffer to speed up small requests (thanks Albert Strasheim).
-* crypto/rsa: left-pad OAEP results when needed.
-* crypto/tls: make protocol negotiation failure fatal.
-* fmt: stop giving characters to the Scan method of Scanner when we hit a newline in Scanln.
-* gc: interface error message fixes,
- make string const comparison unsigned (thanks Jeff R. Allen).
-* go spec: minor clarification on channel types.
-* go/ast, parser: condition in if statement is mandatory.
-* gob: compute information about a user's type once.
- protect against pure recursive types.
-* godoc: accept symbolic links as path names provided to -path,
- add robots.txt, log errors when reading filter files.
-* html: tokenize HTML comments.
-* http: add proxy support (thanks Yasuhiro Matsumoto),
- implement with net/textproto (thanks Petar Maymounkov),
- send full URL in proxy requests,
- introduce start of Client and ClientTransport.
-* image/png: support for more formats (thanks Mikael Tillenius).
-* json: only use alphanumeric tags,
- use base64 to encode []byte (thanks Roger Peppe).
-* ld: detect stack overflow due to NOSPLIT, drop rpath, support weak symbols.
-* misc/dashboard/builder: talk to hg with utf-8 encoding.
-* misc/dashboard: notify golang-dev on build failure.
-* net: *netFD.Read to return os.EOF on eof under windows (thanks Alex Brainman),
- add IPv4 multicast to UDPConn (thanks Dave Cheney),
- more accurate IPv4-in-IPv6 API test (thanks Mikio Hara),
- reject invalid net:proto network names (thanks Olivier Antoine).
-* netchan: allow use of arbitrary connections (thanks Roger Peppe).
-* os: add ENODATA and ENOTCONN (thanks Albert Strasheim).
-* reflect: add a couple of sentences explaining how Methods operate,
- add a secret method to ArrayOrSliceType to ensure it's only implemented by arrays and slices,
- add pointer word to CommonType (placeholder for future work).
-* runtime-gdb.py: gdb pretty printer for go strings properly handles length.
-* runtime: various bug fixes, more complete stack traces,
- record $GOROOT_FINAL for runtime.GOROOT.
-* spec: delete incorrect mention of selector working on pointer to interface type.
-* sync: add Cond (thanks Gustavo Niemeyer).
-* syscall: add MCL_* flags for mlockall (thanks Albert Strasheim),
- implement chmod() for win32 (thanks Yasuhiro Matsumoto).
-* test/bench: update timings for new GC.
-* testing: rename cmdline flags to avoid conflicts (thanks Gustavo Niemeyer).
-* textproto: introduce Header type (thanks Petar Maymounkov).
-* websocket: use new interface to access Header.
-</pre>
-
-<h3 id="2011-02-15">2011-02-15</h3>
-
-<pre>
-This release includes changes to the io, os, and template packages.
-You may need to update your code.
-
-The io.ReadByter and io.ReadRuner interface types have been renamed to
-io.ByteReader and io.RuneReader respectively.
-
-The os package's ForkExec function has been superseded by the new StartProcess
-function and an API built around the Process type:
- http://golang.org/pkg/os/#Process
-
-The order of arguments to template.Execute has been reversed to be consistent
-the notion of "destination first", as with io.Copy, fmt.Fprint, and others.
-
-Gotest now works for package main in directories using Make.cmd-based makefiles.
-
-The memory allocation runtime problems from the last release are not completely
-fixed. The virtual memory exhaustion problems encountered by people using
-ulimit -v have been fixed, but there remain known garbage collector problems
-when using GOMAXPROCS > 1.
-
-Other changes:
-* 5l: stopped generating 64-bit eor.
-* 8l: more work on plan9 support (thanks Yuval Pavel Zholkover).
-* archive/zip: handle files with data descriptors.
-* arm: working peep-hole optimizer.
-* asn1: marshal true as 255, not 1.
-* buffer.go: minor optimization, expanded comment.
-* build: drop syslog on DISABLE_NET_TESTS=1 (thanks Gustavo Niemeyer),
- allow clean.bash to work on fresh checkout,
- change "all tests pass" message to be more obvious,
- fix spaces in GOROOT (thanks Christopher Nielsen).
-* bytes: fix bug in buffer.ReadBytes (thanks Evan Shaw).
-* 5g: better int64 code,
- don't use MVN instruction.
-* cgo: don't run cgo when not compiling (thanks Gustavo Niemeyer),
- fix _cgo_run timestamp file order (thanks Gustavo Niemeyer),
- fix handling of signed enumerations (thanks Gustavo Niemeyer),
- os/arch dependent #cgo directives (thanks Gustavo Niemeyer),
- rename internal f to avoid conflict with possible C global named f.
-* codereview: fix hgpatch on windows (thanks Yasuhiro Matsumoto),
- record repository, base revision,
- use cmd.communicate (thanks Yasuhiro Matsumoto).
-* container/ring: replace Iter() with Do().
-* crypto/cipher: add resync open to OCFB mode.
-* crypto/openpgp/armor: bug fixes.
-* crypto/openpgp/packet: new subpackage.
-* crypto/tls: load a chain of certificates from a file,
- select best cipher suite, not worst.
-* crypto/x509: add support for name constraints.
-* debug/pe: ImportedSymbols fixes (thanks Wei Guangjing).
-* doc/code: update to reflect that package names need not be unique.
-* doc/codelab/wiki: a bunch of fixes (thanks Andrey Mirtchovski).
-* doc/install: update for new versions of Mercurial.
-* encoding/line: fix line returned after EOF.
-* flag: allow hexadecimal (0xFF) and octal (0377) input for integer flags.
-* fmt.Scan: scan binary-exponent floating format, 2.4p-3,
- hexadecimal (0xFF) and octal (0377) integers.
-* fmt: document %%; also %b for floating point.
-* gc, ld: detect stale or incompatible object files,
- package name main no longer reserved.
-* gc: correct receiver in method missing error (thanks Lorenzo Stoakes),
- correct rounding of denormal constants (thanks Eoghan Sherry),
- select receive bug fix.
-* go/printer, gofmt: smarter handling of multi-line raw strings.
-* go/printer: line comments must always end in a newline,
- remove notion of "Styler", remove HTML mode.
-* gob: allow Decode(nil) and have it just discard the next value.
-* godoc: use IsAbs to test for absolute paths (fix for win32) (thanks Yasuhiro Matsumoto),
- don't hide package lookup error if there's no command with the same name.
-* gotest: enable unit tests for main programs.
-* http: add Server type supporting timeouts,
- add pipelining to ClientConn, ServerConn (thanks Petar Maymounkov),
- handle unchunked, un-lengthed HTTP/1.1 responses.
-* io: add RuneReader.
-* json: correct Marshal documentation.
-* netchan: graceful handling of closed connection (thanks Graham Miller).
-* os: implement new Process API (thanks Alex Brainman).
-* regexp tests: make some benchmarks more meaningful.
-* regexp: add support for matching against text read from RuneReader interface.
-* rpc: make more tolerant of errors, properly discard values (thanks Roger Peppe).
-* runtime: detect failed thread creation on Windows,
- faster allocator, garbage collector,
- fix virtual memory exhaustion,
- implemented windows console ctrl handler (SIGINT) (thanks Hector Chu),
- more detailed panic traces, line number work,
- improved Windows callback handling (thanks Hector Chu).
-* spec: adjust notion of Assignability,
- allow import of packages named main,
- clarification re: method sets of newly declared pointer types,
- fix a few typos (thanks Anthony Martin),
- fix Typeof() return type (thanks Gustavo Niemeyer),
- move to Unicode 6.0.
-* sync: diagnose Unlock of unlocked Mutex,
- new Waitgroup type (thanks Gustavo Niemeyer).
-* syscall: add SetsockoptIpMreq (thanks Dave Cheney),
- add sockaddr_dl, sysctl with routing message support for darwin, freebsd (thanks Mikio Hara),
- do not use NULL for zero-length read, write,
- implement windows version of Fsync (thanks Alex Brainman),
- make ForkExec acquire the ForkLock under windows (thanks Hector Chu),
- make windows API return errno instead of bool (thanks Alex Brainman),
- remove obsolete socket IO control (thanks Mikio Hara).
-* template: add simple formatter chaining (thanks Kyle Consalus),
- allow a leading '*' to indirect through a pointer.
-* testing: include elapsed time in test output
-* windows: replace remaining __MINGW32__ instances with _WIN32 (thanks Joe Poirier).
-</pre>
-
-<h3 id="2011-02-01">2011-02-01</h3>
-
-<pre>
-This release includes significant changes to channel operations and minor
-changes to the log package. Your code will require modification if it uses
-channels in non-blocking communications or the log package's Exit functions.
-
-Non-blocking channel operations have been removed from the language.
-The equivalent operations have always been possible using a select statement
-with a default clause. If a default clause is present in a select, that clause
-will execute (only) if no other is ready, which allows one to avoid blocking on
-a communication.
-
-For example, the old non-blocking send operation,
-
- if ch <- v {
- // sent
- } else {
- // not sent
- }
-
-should be rewritten as,
-
- select {
- case ch <- v:
- // sent
- default:
- // not sent
- }
-
-Similarly, this receive,
-
- v, ok := <-ch
- if ok {
- // received
- } else {
- // not received
- }
-
-should be rewritten as,
-
- select {
- case v := <-ch:
- // received
- default:
- // not received
- }
-
-This change is a prelude to redefining the 'comma-ok' syntax for a receive.
-In a later release, a receive expression will return the received value and an
-optional boolean indicating whether the channel has been closed. These changes
-are being made in two stages to prevent this semantic change from silently
-breaking code that uses 'comma-ok' with receives.
-There are no plans to have a boolean expression form for sends.
-
-Sends to a closed channel will panic immediately. Previously, an unspecified
-number of sends would fail silently before causing a panic.
-
-The log package's Exit, Exitf, and Exitln functions have been renamed Fatal,
-Fatalf, and Fatalln respectively. This brings them in line with the naming of
-the testing package.
-
-The port to the "tiny" operating system has been removed. It is unmaintained
-and untested. It was a toy to show that Go can run on raw hardware and it
-served its purpose. The source code will of course remain in the repository
-history, so it could be brought back if needed later.
-
-This release also changes some of the internal structure of the memory
-allocator in preparation for other garbage collector changes.
-If you run into problems, please let us know.
-There is one known issue that we are aware of but have not debugged yet:
- http://code.google.com/p/go/issues/detail?id=1464&.
-
-Other changes in this release:
-* 5l: document -F, force it on old ARMs (software floating point emulation)
-* 6g: fix registerization of temporaries (thanks Eoghan Sherry),
- fix uint64(uintptr(unsafe.Pointer(&x))).
-* 6l: Relocate CMOV* instructions (thanks Gustavo Niemeyer),
- windows/amd64 port (thanks Wei Guangjing).
-* 8l: add PE dynexport, emit DWARF in Windows PE, and
- code generation fixes (thanks Wei Guangjing).
-* bufio: make Flush a no-op when the buffer is empty.
-* bytes: Add Buffer.ReadBytes, Buffer.ReadString (thanks Evan Shaw).
-* cc: mode to generate go-code for types and variables.
-* cgo: define CGO_CFLAGS and CGO_LDFLAGS in Go files (thanks Gustavo Niemeyer),
- windows/386 port (thanks Wei Guangjing).
-* codereview: fix windows (thanks Hector Chu),
- handle file patterns better,
- more ASCII vs. Unicode nonsense.
-* crypto/dsa: add support for DSA.
-* crypto/openpgp: add s2k.
-* crypto/rand: use defer to unlock mutex (thanks Anschel Schaffer-Cohen).
-* crypto/rsa: correct docstring for SignPKCS1v15.
-* crypto: add package, a common place to store identifiers for hash functions.
-* doc/codelab/wiki: update to work with template changes, add to run.bash.
-* doc/spec: clarify address operators.
-* ebnflint: exit with non-zero status on error.
-* encoding/base32: new package (thanks Miek Gieben).
-* encoding/line: make it an io.Reader too.
-* exec: use custom error for LookPath (thanks Gustavo Niemeyer).
-* fmt/doc: define width and precision for strings.
-* gc: clearer error for struct == struct,
- fix send precedence,
- handle invalid name in type switch,
- special case code for single-op blocking and non-blocking selects.
-* go/scanner: fix build (adjust scanner EOF linecount).
-* gob: better debugging, commentary,
- make nested interfaces work,
- report an error when encoding a non-empty struct with no public fields.
-* godoc: full text index for whitelisted non-Go files,
- show line numbers for non-go files (bug fix).
-* gofmt -r: match(...) arguments may be nil; add missing guards.
-* govet: add Panic to the list of functions.
-* http: add host patterns (thanks Jose Luis Vázquez González),
- follow relative redirect in Get.
-* json: handle capital floating point exponent (1E100) (thanks Pieter Droogendijk).
-* ld: add -I option to set ELF interpreter,
- more robust decoding of reflection type info in generating dwarf.
-* lib9: update to Unicode 6.0.0.
-* make.bash: stricter selinux test (don't complain unless it is enabled).
-* misc/vim: Import/Drop commands (thanks Gustavo Niemeyer),
- set 'syntax sync' to a large value (thanks Yasuhiro Matsumoto).
-* net: fix race condition in test,
- return cname in LookupHost.
-* netchan: avoid race condition in test,
- fixed documentation for import (thanks Anschel Schaffer-Cohen).
-* os: add ETIMEDOUT (thanks Albert Strasheim).
-* runtime: generate Go defs for C types,
- implementation of callback functions for windows (thanks Alex Brainman),
- make Walk web browser example work (thanks Hector Chu),
- make select fairer,
- prefer fixed stack allocator over general memory allocator,
- simpler heap map, memory allocation.
-* scanner: fix Position returned by Scan, Pos,
- don't read ahead in Init.
-* suffixarray: use binary search for both ends of Lookup (thanks Eric Eisner).
-* syscall: add missing network interface constants (thanks Mikio Hara).
-* template: treat map keys as zero, not non-existent (thanks Roger Peppe).
-* time: allow cancelling of After events (thanks Roger Peppe),
- support Solaris zoneinfo directory.
-* token/position: added SetLinesForContent.
-* unicode: update to unicode 6.0.0.
-* unsafe: add missing case to doc for Pointer.
-</pre>
-
-<h3 id="2011-01-20">2011-01-20</h3>
-
-<pre>
-This release removes the float and complex types from the language.
-
-The default type for a floating point literal is now float64, and
-the default type for a complex literal is now complex128.
-
-Existing code that uses float or complex must be rewritten to
-use explicitly sized types.
-
-The two-argument constructor cmplx is now spelled complex.
-</pre>
-
-<h3 id="2011-01-19">2011-01-19</h3>
-
-<pre>
-The 5g (ARM) compiler now has registerization enabled. If you discover it
-causes bugs, use 5g -N to disable the registerizer and please let us know.
-
-The xml package now allows the extraction of nested XML tags by specifying
-struct tags of the form "parent>child". See the XML documentation for an
-example: http://golang.org/pkg/xml/
-
-* 5a, 5l, 6a, 6l, 8a, 8l: handle out of memory, large allocations (thanks Jeff R. Allen).
-* 8l: pe changes (thanks Alex Brainman).
-* arm: fixes and improvements.
-* cc: fix vlong condition.
-* cgo: add complex float, complex double (thanks Sebastien Binet),
- in _cgo_main.c define all provided symbols as functions.
-* codereview: don't mail change lists with no files (thanks Ryan Hitchman).
-* crypto/cipher: add OFB mode.
-* expvar: add Float.
-* fmt: document %X of string, []byte.
-* gc, runtime: make range on channel safe for multiple goroutines.
-* gc: fix typed constant declarations (thanks Anthony Martin).
-* go spec: adjust language for constant typing.
-* go/scanner: Make Init take a *token.File instead of a *token.FileSet.
-* godoc: bring back "indexing in progress" message,
- don't double HTML-escape search result snippets,
- enable qualified identifiers ("math.Sin") as query strings again,
- peephole optimization for generated HTML,
- remove tab before formatted section.
-* gofmt, go/printer: do not insert extra line breaks where they may break the code.
-* http: fix Content-Range and Content-Length in response (thanks Clement Skau),
- fix scheme-relative URL parsing; add ParseRequestURL,
- handle HEAD requests correctly,
- support for relative URLs.
-* math: handle denormalized numbers in Frexp, Ilogb, Ldexp, and Logb (thanks Eoghan Sherry).
-* net, syscall: return source address in Recvmsg (thanks Albert Strasheim).
-* net: add LookupAddr (thanks Kyle Lemons),
- add unixpacket (thanks Albert Strasheim),
- avoid nil dereference if /etc/services can't be opened (thanks Corey Thomasson),
- implement windows timeout (thanks Wei Guangjing).
-* netchan: do not block sends; implement flow control (thanks Roger Peppe).
-* regexp: reject bare '?'. (thanks Ben Lynn)
-* runtime/cgo: don't define crosscall2 in dummy _cgo_main.c.
-* runtime/debug: new package for printing stack traces from a running goroutine.
-* runtime: add per-pause gc stats,
- fix arm reflect.call boundary case,
- print signal information during panic.
-* spec: specify that int and uint have the same size.
-* syscall: correct WSTOPPED on OS X,
- correct length of GNU/Linux abstract Unix domain sockaddr,
- correct length of SockaddrUnix.
-* tutorial: make stdin, stdout, stderr work on Windows.
-* windows: implement exception handling (thanks Hector Chu).
-</pre>
-
-<h3 id="2011-01-12">2011-01-12</h3>
-
-<pre>
-The json, gob, and template packages have changed, and code that uses them
-may need to be updated after this release. They will no longer read or write
-unexported struct fields. When marshalling a struct with json or gob the
-unexported fields will be silently ignored. Attempting to unmarshal json or
-gob data into an unexported field will generate an error. Accessing an
-unexported field from a template will cause the Execute function to return
-an error.
-
-Godoc now supports regular expression full text search, and this
-functionality is now available on golang.org.
-
-Other changes:
-* arm: initial cut at arm optimizer.
-* bytes.Buffer: Fix bug in UnreadByte.
-* cgo: export unsafe.Pointer as void*, fix enum const conflict,
- output alignment fix (thanks Gustavo Niemeyer).
-* crypto/block: mark as deprecated.
-* crypto/openpgp: add error and armor.
-* crypto: add twofish package (thanks Berengar Lehr).
-* doc/spec: remove Maxalign from spec.
-* encoding/line: new package for reading lines from an io.Reader.
-* go/ast: correct end position for Index and TypeAssert expressions.
-* gob: make (en|dec)code(Ui|I)nt methods rather than functions.
-* godefs: better handling of enums.
-* gofmt: don't attempt certain illegal rewrites,
- rewriter matches apply to expressions only.
-* goinstall: preliminary support for cgo packages (thanks Gustavo Niemeyer).
-* hg: add cgo/_cgo_* to .hgignore.
-* http: fix text displayed in Redirect.
-* ld: fix exported dynamic symbols on Mach-O,
- permit a Mach-O symbol to be exported in the dynamic symbol table.
-* log: add methods for exit and panic.
-* net: use closesocket api instead of CloseHandle on Windows (thanks Alex Brainman).
-* netchan: make fields exported for gob change.
-* os: add Sync to *File, wraps syscall.Fsync.
-* runtime/cgo: Add callbacks to support SWIG.
-* runtime: Restore scheduler stack position if cgo callback panics.
-* suffixarray: faster creation algorithm (thanks Eric Eisner).
-* syscall: fix mksysnum_linux.sh (thanks Anthony Martin).
-* time.NewTicker: panic for intervals <= 0.
-* time: add AfterFunc to call a function after a duration (thanks Roger Peppe),
- fix tick accuracy when using multiple Tickers (thanks Eoghan Sherry).</pre>
-
-<h3 id="2011-01-06">2011-01-06</h3>
-
-<pre>
-This release includes several fixes and changes:
-
-* build: Make.pkg: use installed runtime.h for cgo.
-* cgo: disallow use of C.errno.
-* crypto/cipher: fix OCFB,
- make NewCBCEncrypter return BlockMode.
-* doc: 6l: fix documentation of -L flag,
- add golanguage.ru to foreign-language doc list,
- effective go: explain the effect of repanicking better,
- update Effective Go for template API change,
- update contribution guidelines to prefix the change description.
-* encoding/binary: reject types with implementation-dependent sizes (thanks Patrick Gavlin).
-* exp/evalsimple fix handling of slices like s[:2] (thanks Sebastien Binet).
-* fmt: made format string handling more efficient,
- normalize processing of format string.
-* gc: return constant floats for parts of complex constants (thanks Anthony Martin),
- rewrite complex /= to l = l / r (thanks Patrick Gavlin),
- fix &^=.
-* go/ast: provide complete node text range info.
-* gob: generate a better error message in one confusing place.
-* godoc: fix godoc -src (thanks Icarus Sparry).
-* goinstall: add -clean flag (thanks Kyle Lemons),
- add checkout concept (thanks Caine Tighe),
- fix -u for bzr (thanks Gustavo Niemeyer).
-* http: permit empty Reason-Phrase in response Status-Line.
-* io: fix Copyn EOF handling.
-* net: fix close of Listener (thanks Michael Hoisie).
-* regexp: fix performance bug, make anchored searches fail fast,
- fix prefix bug.
-* runtime/cgo: fix stackguard on FreeBSD/amd64 (thanks Anthony Martin).
-* strconv: atof: added 'E' as valid token for exponent (thanks Stefan Nilsson),
- update ftoa comment for 'E' and 'G'.
-* strings: fix description of FieldsFunc (thanks Roger Peppe).
-* syscall: correct Linux Splice definition,
- make Access second argument consistently uint32.
-</pre>
-
-<h3 id="2010-12-22">2010-12-22</h3>
-
-<pre>
-A small release this week. The most significant change is that some
-outstanding cgo issues were resolved.
-
-* cgo: handle references to symbols in shared libraries.
-* crypto/elliptic: add serialisation and key pair generation.
-* crypto/hmac: add HMAC-SHA256 (thanks Anthony Martin).
-* crypto/tls: add ECDHE support ("Elliptic Curve Diffie Hellman Ephemeral"),
- add support code for generating handshake scripts for testing.
-* darwin, freebsd: ignore write failure (during print, panic).
-* exp/draw: remove Border function.
-* expvar: quote StringFunc output, same as String output.
-* hash/crc64: fix typo in Sum.
-* ld: allow relocations pointing at ELF .bss symbols, ignore stab symbols.
-* misc/cgo/life: fix, add to build.
-* regexp: add HasMeta, HasOperator, and String methods to Regexp.
-* suffixarray: implemented FindAllIndex regexp search.
-* test/bench: update numbers for regex-dna after speedup to regexp.
-* time: explain the formats a little better.
</pre>
-<h3 id="2010-12-15">2010-12-15</h3>
+<p>should now be written as:</p>
<pre>
-Package crypto/cipher has been started, to replace crypto/block.
-As part of the changes, rc4.Cipher's XORKeyStream method signature has changed from
- XORKeyStream(buf []byte)
-to
- XORKeyStream(dst, src []byte)
-to implement the cipher.Stream interface. If you use crypto/block, you'll need
-to switch to crypto/cipher once it is complete.
-
-Package smtp's StartTLS now takes a *tls.Config argument.
-
-Package reflect's ArrayCopy has been renamed to Copy. There are new functions
-Append and AppendSlice.
-
-The print/println bootstrapping functions now write to standard error.
-To write to standard output, use fmt.Print[ln].
-
-A new tool, govet, has been added to the Go distribution. Govet is a static
-checker for Go programs. At the moment, and for the forseeable future,
-it only checks arguments to print calls.
-
-The cgo tool for writing Go bindings for C code has changed so that it no
-longer uses stub .so files (like cgo_stdio.so). Cgo-based packages using the
-standard Makefiles should build without any changes. Any alternate build
-mechanisms will need to be updated.
-
-The C and Go compilers (6g, 6c, 8g, 8c, 5g, 5c) now align structs according to
-the maximum alignment of the fields they contain; previously they aligned
-structs to word boundaries. This may break non-cgo-based code that attempts to
-mix C and Go.
-
-NaCl support has been removed. The recent linker changes broke NaCl support
-a month ago, and there are no known users of it.
-If necessary, the NaCl code can be recovered from the repository history.
-
-* 5g/8g, 8l, ld, prof: fix output of 32-bit values (thanks Eoghan Sherry).
-* [68]l and runtime: GDB support for interfaces and goroutines.
-* 6l, 8l: support for linking ELF and Mach-O .o files.
-* all: simplify two-variable ranges with unused second variable (thanks Ryan Hitchman).
-* arm: updated soft float support.
-* codereview: keep quiet when not in use (thanks Eoghan Sherry).
-* compress/flate: implement Flush, equivalent to zlib's Z_SYNC_FLUSH.
-* crypto/tls: use rand.Reader in cert generation example (thanks Anthony Martin).
-* dashboard: fix project tag filter.
-* debug/elf, debug/macho: add ImportedLibraries, ImportedSymbols.
-* doc/go_mem: goroutine exit is not special.
-* event.go: another print glitch from gocheck.
-* gc: bug fixes,
- syntax error for incomplete chan type (thanks Ryan Hitchman).
-* go/ast: fix ast.Walk.
-* gob: document the byte count used in the encoding of values,
- fix bug sending zero-length top-level slices and maps,
- Register should use the original type, not the indirected one.
-* godashboard: support submitting projects with non-ascii names (thanks Ryan Hitchman)
-* godefs: guard against structs with pad fields
-* godoc: added textual search, to enable use -fulltext flag.
-* gofmt: simplify "x, _ = range y" to "x = range y".
-* gopack: allow ELF/Mach-O objects in .a files without clearing allobj.
-* go/token,scanner: fix comments so godoc aligns properly.
-* govet: on error continue to the next file (thanks Christopher Wedgwood).
-* html: improved parsing.
-* http: ServeFile handles Range header for partial requests.
-* json: check for invalid UTF-8.
-* ld: allow .o files with no symbols,
- reading of ELF object files,
- reading of Mach-O object files.
-* math: change float64 bias constant from 1022 to 1023 (thanks Eoghan Sherry),
- rename the MinFloat constant to SmallestNonzeroFloat.
-* nm: silently ignore .o files in .a files.
-* os: fix test of RemoveAll.
-* os/inotify: new package (thanks Balazs Lecz).
-* os: make MkdirAll work with symlinks (thanks Ryan Hitchman).
-* regexp: speed up by about 30%; also simplify code for brackets.
-* runtime/linux/386: set FPU to 64-bit precision.
-* runtime: remove paranoid mapping at 0.
-* suffixarray: add Bytes function.
-* syscall: add network interface constants for linux/386, linux/amd64 (thanks Mikio Hara).
-* syscall/windows: restrict access rights param of OpenProcess(),
- remove \r and \n from error messages (thanks Alex Brainman).
-* test/bench: fixes to timing.sh (thanks Anthony Martin).
-* time: fix bug in Ticker: shutdown using channel rather than memory.
-* token/position: provide FileSet.File, provide files iterator.
-* xml: disallow invalid Unicode code points (thanks Nigel Kerr).
-</pre>
-
-<h3 id="2010-12-08">2010-12-08</h3>
-
-<pre>
-This release includes some package changes. If you use the crypto/tls or
-go/parser packages your code may require changes.
-
-The crypto/tls package's Dial function now takes an additional *Config
-argument. Most uses will pass nil to get the same default behavior as before.
-See the documentation for details:
- http://golang.org/pkg/crypto/tls/#Config
- http://golang.org/pkg/crypto/tls/#Dial
-
-The go/parser package's ParseFile function now takes a *token.FileSet as its
-first argument. This is a pointer to a data structure used to store
-position information. If you don't care about position information you
-can pass "token.NewFileSet()". See the documentation for details:
- http://golang.org/pkg/go/parser/#ParseFile
-
-This release also splits the patent grant text out of the LICENSE file into a
-separate PATENTS file and changes it to be more like the WebM grant.
-These clarifications were made at the request of the Fedora project.
-
-Other changes:
-* [68]l: generate debug info for builtin structured types, prettyprinting in gdb.
-* 8l: add dynimport to import table in Windows PE (thanks Wei Guangjing).
-* 8l, runtime: fix Plan 9 386 build (thanks Yuval Pavel Zholkover).
-* all: fix broken calls to Printf etc.
-* bufio: make Reader.Read implement io.Reader semantics (thanks Roger Peppe).
-* build: allow archiver to be specified by HOST_AR (thanks Albert Strasheim).
-* bytes: add Buffer.UnreadRune, Buffer.UnreadByte (thanks Roger Peppe).
-* crypto/tls: fix build of certificate generation example (thanks Christian Himpel).
-* doc/install: describe GOHOSTOS and GOHOSTARCH.
-* errchk: accept multiple source files (thanks Eoghan Sherry).
-* exec.LookPath: return os.PathError instad of os.ENOENT (thanks Michael Hoisie)..
-* flag: fix format error in boolean error report,
- handle multiple calls to flag.Parse.
-* fmt: add %U format for standard Unicode representation of code point values.
-* gc: fix method offsets of anonymous interfaces (thanks Eoghan Sherry),
- skip undefined symbols in import . (thanks Eoghan Sherry).
-* go/scanner: remove Tokenize - was only used in tests
-* gobuilder: add buildroot command-line flag (thanks Devon H. O'Dell).
-* html: unescape numeric entities (thanks Ryan Hitchman).
-* http: Add EncodeQuery, helper for constructing query strings.
-* ld: fix dwarf decoding of 64-bit reflect values (thanks Eoghan Sherry).
-* math: improve accuracy of Exp2 (thanks Eoghan Sherry).
-* runtime: add Goroutines (thanks Keith Rarick).
-* sync: small naming fix for armv5 (thanks Dean Prichard).
-* syscall, net: Add Recvmsg and Sendmsg on Linux (thanks Albert Strasheim).
-* time: make After use fewer goroutines and host processes (thanks Roger Peppe).
-</pre>
-
-<h3 id="2010-12-02">2010-12-02</h3>
-
-<pre>
-Several package changes in this release may require you to update your code if
-you use the bytes, template, or utf8 packages. In all cases, any outdated code
-will fail to compile rather than behave erroneously.
-
-The bytes package has changed. Its Add and AddByte functions have been removed,
-as their functionality is provided by the recently-introduced built-in function
-"append". Any code that uses them will need to be changed:
-s = bytes.Add(s, b) -> s = append(s, b...)
-s = bytes.AddByte(b, c) -> s = append(s, b)
-s = bytes.Add(nil, c) -> append([]byte(nil), c)
-
-The template package has changed. Your code will need to be updated if it calls
-the HTMLFormatter or StringFormatter functions, or implements its own formatter
-functions. The function signature for formatter types has changed to:
- func(wr io.Writer, formatter string, data ...interface{})
-to allow multiple arguments to the formatter. No templates will need updating.
-See the change for examples:
- http://code.google.com/p/go/source/detail?r=2c2be793120e
-
-The template change permits the implementation of multi-word variable
-instantiation for formatters. Before one could say
- {field}
-or
- {field|formatter}
-Now one can also say
- {field1 field2 field3}
-or
- {field1 field2 field3|formatter}
-and the fields are passed as successive arguments to the formatter,
-by analogy to fmt.Print.
-
-The utf8 package has changed. The order of EncodeRune's arguments has been
-reversed to satisfy the convention of "destination first".
-Any code that uses EncodeRune will need to be updated.
-
-Other changes:
-* [68]l: correct dwarf location for globals and ranges for arrays.
-* big: fix (*Rat) SetFrac64(a, b) when b < 0 (thanks Eoghan Sherry).
-* compress/flate: fix typo in comment (thanks Mathieu Lonjaret).
-* crypto/elliptic: use a Jacobian transform for better performance.
-* doc/code.html: fix reference to "gomake build" (thanks Anschel Schaffer-Cohen).
-* doc/roadmap: update gdb status.
-* doc/spec: fixed some omissions and type errors.
-* doc: some typo fixes (thanks Peter Mundy).
-* exp/eval: build fix for parser.ParseFile API change (thanks Anschel Schaffer-Cohen).
-* fmt: Scan accepts Inf and NaN,
- allow "% X" as well as "% x".
-* go/printer: preserve newlines in func parameter lists (thanks Jamie Gennis).
-* http: consume request body before next request.
-* log: ensure writes are atomic (thanks Roger Peppe).
-* path: Windows support for Split (thanks Benny Siegert).
-* runtime: fix SysFree to really free memory on Windows (thanks Alex Brainman),
- parallel definitions in Go for all C structs.
-* sort: avoid overflow in pivot calculation,
- reduced stack depth to lg(n) in quickSort (thanks Stefan Nilsson).
-* strconv: Atof on Infs and NaNs.
-</pre>
-
-<h3 id="2010-11-23">2010-11-23</h3>
-
-<pre>
-This release includes a backwards-incompatible package change to the
-sort.Search function (introduced in the last release).
-See the change for details and examples of how you might change your code:
- http://code.google.com/p/go/source/detail?r=102866c369
-
-* build: automatically #define _64BIT in 6c.
-* cgo: print required space after parameter name in wrapper function.
-* crypto/cipher: new package to replace crypto/block (thanks Adam Langley).
-* crypto/elliptic: new package, implements elliptic curves over prime fields (thanks Adam Langley).
-* crypto/x509: policy OID support and fixes (thanks Adam Langley).
-* doc: add link to codewalks,
- fix recover() documentation (thanks Anschel Schaffer-Cohen),
- explain how to write Makefiles for commands.
-* exec: enable more tests on windows (thanks Alex Brainman).
-* gc: adjustable hash code in typecheck of composite literals
- (thanks to vskrap, Andrey Mirtchovski, and Eoghan Sherry).
-* gc: better error message for bad type in channel send (thanks Anthony Martin).
-* godoc: bug fix in relativePath,
- compute search index for all file systems under godoc's observation,
- use correct time stamp to indicate accuracy of search result.
-* index/suffixarray: use sort.Search.
-* net: add ReadFrom and WriteTo windows version (thanks Wei Guangjing).
-* reflect: remove unnecessary casts in Get methods.
-* rpc: add RegisterName to allow override of default type name.
-* runtime: free memory allocated by windows CommandLineToArgv (thanks Alex Brainman).
-* sort: simplify Search (thanks Roger Peppe).
-* strings: add LastIndexAny (thanks Benny Siegert).
-</pre>
-
-<h3 id="2010-11-10">2010-11-10</h3>
-
-<pre>
-The birthday release includes a new Search capability inside the sort package.
-It takes an unusual but very general and easy-to-use approach to searching
-arbitrary indexable sorted data. See the documentation for details:
- http://golang.org/pkg/sort/#Search
-
-The ARM port now uses the hardware floating point unit (VFP). It still has a
-few bugs, mostly around conversions between unsigned integer and floating-point
-values, but it's stabilizing.
-
-In addition, there have been many smaller fixes and updates:
-
-* 6l: generate dwarf variable names with disambiguating suffix.
-* container/list: make Remove return Value of removed element.
- makes it easier to remove first or last item.
-* crypto: add cast5 (default PGP cipher),
- switch block cipher methods to be destination first.
-* crypto/tls: use pool building for certificate checking
-* go/ast: change embedded token.Position fields to named fields
- (preparation for a different position representation)
-* net: provide public access to file descriptors (thanks Keith Rarick)
-* os: add Expand function to evaluate environment variables.
-* path: add Glob (thanks Benny Siegert)
-* runtime: memequal optimization (thanks Graham Miller)
- prefix all external symbols with "runtime·" to avoid
- conflicts linking with external C libraries.
-</pre>
-
-<h3 id="2010-11-02">2010-11-02</h3>
-
-<pre>
-This release includes a language change: the new built-in function, append.
-Append makes growing slices much simpler. See the spec for details:
- http://golang.org/doc/go_spec.html#Appending_and_copying_slices
-
-Other changes:
-* 8l: pe generation fixes (thanks Alex Brainman).
-* doc: Effective Go: append and a few words about "..." args.
-* build: fiddle with make variables.
-* codereview: fix sync and download in Python 2.7 (thanks Fazlul Shahriar).
-* debug/pe, cgo: add windows support (thanks Wei Guangjing <vcc.163@gmail.com>).
-* go/ast: add Inspect function for easy AST inspection w/o a visitor.
-* go/printer: do not remove parens around composite literals starting with
- a type name in control clauses.
-* go/scanner: bug fixes, revisions, and more tests.
-* gob: several fixes and documentation updates.
-* godoc: bug fix (bug introduced with revision 3ee58453e961).
-* gotest: print empty benchmark list in a way that gofmt will leave alone.
-* http server: correctly respond with 304 NotModified (thanks Michael Hoisie).
-* kate: update list of builtins (thanks Evan Shaw).
-* libutf: update to Unicode 5.2.0 to match pkg/unicode (thanks Anthony Martin).
-* misc/bbedit: update list of builtins (thanks Anthony Starks).
-* misc/vim: update list of builtins.
-* mkrunetype: install a Makefile and tweak it slightly so it can be built.
-* netchan: fix locking bug.
-* pidigits: minor improvements (thanks Evan Shaw).
-* rpc: fix client deadlock bug.
-* src: use append where appropriate (often instead of vector).
-* strings: add Contains helper function (thanks Brad Fitzpatrick).
-* syscall: SIO constants for Linux (thanks Albert Strasheim),
- Stat(path) on windows (thanks Alex Brainman).
-* test/ken/convert.go: add conversion torture test.
-* testing: add Benchmark (thanks Roger Peppe).
-</pre>
-
-<h3 id="2010-10-27">2010-10-27</h3>
-
-<pre>
-*** This release changes the encoding used by package gob.
- If you store gobs on disk, see below. ***
-
-The ARM port (5g) now passes all tests. The optimizer is not yet enabled, and
-floating point arithmetic is performed entirely in software. Work is underway
-to address both of these deficiencies.
-
-The syntax for arrays, slices, and maps of composite literals has been
-simplified. Within a composite literal of array, slice, or map type, elements
-that are themselves composite literals may elide the type if it is identical to
-the outer literal's element type. For example, these expressions:
- [][]int{[]int{1, 2, 3}, []int{4, 5}}
- map[string]Point{"x": Point{1.5, -3.5}, "y": Point{0, 0}}
-can be simplified to:
- [][]int{{1, 2, 3}, {4, 5}}
- map[string]Point{"x": {1.5, -3.5}, "y": {0, 0}}
-Gofmt can make these simplifications mechanically when invoked with the
-new -s flag.
-
-The built-in copy function can now copy bytes from a string value to a []byte.
-Code like this (for []byte b and string s):
- for i := 0; i < len(s); i++ {
- b[i] = s[i]
+ v, ok := <-ch
+ if !ok {
+ // channel is closed
}
-can be rewritten as:
- copy(b, s)
-
-The gob package can now encode and decode interface values containing types
-registered ahead of time with the new Register function. These changes required
-a backwards-incompatible change to the wire format. Data written with the old
-version of the package will not be readable with the new one, and vice versa.
-(Steps were made in this change to make sure this doesn't happen again.)
-We don't know of anyone using gobs to create permanent data, but if you do this
-and need help converting, please let us know, and do not update to this release
-yet. We will help you convert your data.
-
-Other changes:
-* 5g, 6g, 8g: generate code for string index instead of calling function.
-* 5l, 6l, 8l: introduce sub-symbols.
-* 6l/8l: global and local variables and type info.
-* Make.inc: delete unnecessary -fno-inline flag to quietgcc.
-* arm: precise float64 software floating point, bug fixes.
-* big: arm assembly, faster software mulWW, divWW.
-* build: only print "You need to add foo to PATH" when needed.
-* container/list: fix Remove bug and use pointer to self as identifier.
-* doc: show page title in browser title bar,
- update roadmap.
-* encoding/binary: give LittleEndian, BigEndian specific types.
-* go/parser: consume auto-inserted semi when calling ParseExpr().
-* gobuilder: pass GOHOSTOS and GOHOSTARCH to build,
- write build and benchmarking logs to disk.
-* goinstall: display helpful message when encountering a cgo package,
- fix test for multiple package names (thanks Fazlul Shahriar).
-* gotest: generate correct gofmt-formatted _testmain.go.
-* image/png: speed up paletted encoding ~25% (thanks Brad Fitzpatrick).
-* misc: update python scripts to specify python2 as python3 is now "python".
-* net: fix comment on Dial to mention unix/unixgram.
-* rpc: expose Server type to allow multiple RPC Server instances.
-* runtime: print unknown types in panic.
-* spec: append built-in (not yet implemented).
-* src: gofmt -s -w src misc.
- update code to use copy-from-string.
-* test/bench: update numbers.
-* websocket: fix short Read.
</pre>
-<h3 id="2010-10-20">2010-10-20</h3>
-
-<pre>
-This release removes the log package's deprecated functions.
-Code that has not been updated to use the new interface will break.
-See the previous release notes for details:
- http://golang.org/doc/devel/release.html#2010-10-13
-
-Also included are major improvements to the linker. It is now faster,
-uses less memory, and more parallelizable (but not yet parallel).
-
-The nntp package has been removed from the standard library.
-Its new home is the nntp-go project at Google Code:
- http://code.google.com/p/nntp-go
-You can install it with goinstall:
- goinstall nntp-go.googlecode.com/hg/nntp
-And import it in your code like so:
- import "nntp-go.googlecode.com/hg/nntp"
-
-Other changes:
-* 6g: avoid too-large immediate constants.
-* 8l, runtime: initial support for Plan 9 (thanks Yuval Pavel Zholkover).
-* 6l, 8l: more improvements on exporting debug information (DWARF).
-* arm: code gen fixes. Most tests now pass, except for floating point code.
-* big: add random number generation (thanks Florian Uekermann).
-* gc: keep track of real actual type of identifiers,
- report that shift must be unsigned integer,
- select receive with implicit conversion.
-* goplay: fix to run under windows (thanks Yasuhiro Matsumoto).
-* http: do not close connection after sending HTTP/1.0 request.
-* netchan: add new method Hangup to terminate transmission on a channel.
-* os: change TestForkExec so it can run on windows (thanks Yasuhiro Matsumoto).
-* runtime: don't let select split stack.
-* syscall/arm: correct 64-bit system call arguments.
-</pre>
-
-<h3 id="2010-10-13">2010-10-13</h3>
-
-<pre>
-This release includes changes to the log package, the removal of exp/iterable,
-two new tools (gotry and goplay), one small language change, and many other
-changes and fixes. If you use the log or iterable packages, you need to make
-changes to your code.
-
-The log package has changed. Loggers now have only one output, and output to
-standard error by default. The names have also changed, although the old names
-are still supported. They will be deleted in the next release, though, so it
-would be good to update now if you can. For most purposes all you need to do
-is make these substitutions:
- log.Stderr -> log.Println or log.Print
- log.Stderrf -> log.Printf
- log.Crash -> log.Panicln or log.Panic
- log.Crashf -> log.Panicf
- log.Exit -> log.Exitln or log.Exit
- log.Exitf -> log.Exitf (no change)
-Calls to log.New() must drop the second argument.
-Also, custom loggers with exit or panic properties will need to be reworked.
-For full details, see the change description:
- http://code.google.com/p/go/source/detail?r=d8a3c7563d
-
-The language change is that uses of pointers to interface values no longer
-automatically dereference the pointer. A pointer to an interface value is more
-often a beginner's bug than correct code.
-
-The package exp/iterable has been removed. It was an interesting experiment,
-but it encourages writing inefficient code and has outlived its utility.
-
-The new tools:
-* gotry: an exercise in reflection and an unusual tool. Run 'gotry' for details.
-* goplay: a stand-alone version of the Go Playground. See misc/goplay.
-
-Other changes:
-* 6l: Mach-O fixes, and fix to work with OS X nm/otool (thanks Jim McGrath).
-* [568]a: correct line numbers for statements.
-* arm: code generation and runtime fixes,
- adjust recover for new reflect.call,
- enable 6 more tests after net fix.
-* big: fix panic and round correctly in Rat.FloatString (thanks Anthony Martin).
-* build: Make.cmd: remove $(OFILES) (thanks Eric Clark),
- Make.pkg: remove .so before installing new one,
- add GOHOSTOS and GOHOSTARCH environment variables.
-* crypto/tls: better error messages for certificate issues,
- make SetReadTimeout work.
-* doc: add Sydney University video,
- add The Expressiveness of Go talk.
-* exp/draw/x11: support X11 vendors other than "The X.Org Foundation".
-* expvar: add (*Int).Set (thanks Sam Thorogood).
-* fmt: add Errorf helper function,
- allow %d on []byte.
-* gc: O(1) string comparison when lengths differ,
- various bug fixes.
-* http: return the correct error if a header line is too long.
-* image: add image.Tiled type, the Go equivalent of Plan 9's repl bit.
-* ld: be less picky about bad line number info.
-* misc/cgo/life: fix for new slice rules (thanks Graham Miller).
-* net: allow _ in DNS names.
-* netchan: export before import when testing, and
- zero out request to ensure correct gob decoding. (thanks Roger Peppe).
-* os: make tests work on windows (thanks Alex Brainman).
-* runtime: bug fix: serialize mcache allocation,
- correct iteration of large map values,
- faster strequal, memequal (thanks Graham Miller),
- fix argument dump in traceback,
- fix tiny build.
-* smtp: new package (thanks Evan Shaw).
-* syscall: add sockaddr_ll support for linux/386, linux/amd64 (thanks Mikio Hara),
- add ucred structure for SCM_CREDENTIALS over UNIX sockets. (thanks Albert Strasheim).
-* syscall: implement WaitStatus and Wait4() for windows (thanks Wei Guangjing).
-* time: add After.
-* websocket: enable tests on windows (thanks Alex Brainman).
-</pre>
-
-<h3 id="2010-09-29">2010-09-29</h3>
-
-<pre>
-This release includes some minor language changes and some significant package
-changes. You may need to change your code if you use ...T parameters or the
-http package.
-
-The semantics and syntax of forwarding ...T parameters have changed.
- func message(f string, s ...interface{}) { fmt.Printf(f, s) }
-Here, s has type []interface{} and contains the parameters passed to message.
-Before this language change, the compiler recognized when a function call
-passed a ... parameter to another ... parameter of the same type, and just
-passed it as though it was a list of arguments. But this meant that you
-couldn't control whether to pass the slice as a single argument and you
-couldn't pass a regular slice as a ... parameter, which can be handy. This
-change gives you that control at the cost of a few characters in the call.
-If you want the promotion to ..., append ... to the argument:
- func message(f string, s ...interface{}) { fmt.Printf(f, s...) }
-Without the ..., s would be passed to Printf as a single argument of type
-[]interface{}. The bad news is you might need to fix up some of your code,
-but the compiler will detect the situation and warn you.
-
-Also, the http.Handler and http.HandlerFunc types have changed. Where http
-handler functions previously accepted an *http.Conn, they now take an interface
-type http.ResponseWriter. ResponseWriter implements the same methods as *Conn,
-so in most cases the only change required will be changing the type signature
-of your handler function's first parameter. See:
- http://golang.org/pkg/http/#Handler
-
-The utf8 package has a new type, String, that provides efficient indexing
-into utf8 strings by rune (previously an expensive conversion to []int
-was required). See:
- http://golang.org/pkg/utf8/#String
-
-The compiler will now automatically insert a semicolon at the end of a file if
-one is not found. This effect of this is that Go source files are no longer
-required to have a trailing newline.
-
-Other changes:
-* 6prof: more accurate usage message.
-* archive/zip: new package for reading Zip files.
-* arm: fix code generation, 10 more package tests pass.
-* asn1: make interface consistent with json.
-* bufio.UnreadRune: fix bug at EOF.
-* build: clear custom variables like GREP_OPTIONS,
- silence warnings generated by ubuntu gcc,
- use full path when compiling libraries.
-* bytes, strings: change lastIndexFunc to use DecodeLastRune (thanks Roger Peppe).
-* doc: add to and consolidate non-english doc references,
- consolidate FAQs into a single file, go_faq.html,
- updates for new http interface.
-* fmt/Printf: document and tweak error messages produced for bad formats.
-* gc: allow select case expr = <-c,
- eliminate duplicates in method table,
- fix reflect table method receiver,
- improve error message for x \= 0.
-* go/scanner: treat EOF like a newline for purposes of semicolon insertion.
-* gofmt: stability improvements.
-* gotest: leave _testmain.go for "make clean" to clean up.
-* http: correct escaping of different parts of URL,
- support HTTP/1.0 Keep-Alive.
-* json: do not write to unexported fields.
-* libcgo: don't build for NaCl,
- set g, m in thread local storage for windows 386 (thanks Wei Guangjing).
-* math: Fix off-by-one error in Ilogb and Logb. (thanks Charles L. Dorian).
-* misc/dashboard/builder: remove build files after benchmarking.
-* nacl: update instructions for new SDK.
-* net: enable v4-over-v6 on ip sockets,
- fix crash in DialIP.
-* os: check for valid arguments in windows Readdir (thanks Peter Mundy).
-* runtime: add mmap of null page just in case,
- correct stats in SysFree,
- fix unwindstack crash.
-* syscall: add IPPROTO_IPV6 and IPV6_V6ONLY const to fix nacl and windows build,
- add inotify on Linux (thanks Balazs Lecz),
- fix socketpair in syscall_bsd,
- fix windows value of IPV6_V6ONLY (thanks Alex Brainman),
- implement windows version of Utimes (thanks Alex Brainman),
- make mkall.sh work for nacl.
-* test: Add test that causes incorrect error from gccgo.
-* utf8: add DecodeLastRune and DecodeLastRuneInString (thanks Roger Peppe).
-* xml: Allow entities inside CDATA tags (thanks Dan Sinclair).
-</pre>
-
-<h3 id="2010-09-22">2010-09-22</h3>
-
-<pre>
-This release includes new package functionality, and many bug fixes and changes.
-It also improves support for the arm and nacl platforms.
-
-* 5l: avoid fixed buffers in list.
-* 6l, 8l: clean up ELF code, fix NaCl.
-* 6l/8l: emit DWARF frame info.
-* Make.inc: make GOOS detection work on windows (thanks Alex Brainman).
-* build: fixes for native arn build,
- make all.bash run on Ubuntu ARM.
-* cgo: bug fixes,
- show preamble gcc errors (thanks Eric Clark).
-* crypto/x509, crypto/tls: improve root matching and observe CA flag.
-* crypto: Fix certificate validation.
-* doc: variable-width layout.
-* env.bash: fix building in directory with spaces in the path (thanks Alex Brainman).
-* exp/4s, exp/nacl/av: sync to recent exp/draw changes.
-* exp/draw/x11: mouse location is a signed integer.
-* exp/nacl/av: update color to max out at 1<<16-1 instead of 1<<32-1.
-* fmt: support '*' for width or precision (thanks Anthony Martin).
-* gc: improvements to static initialization,
- make sure path names are canonical.
-* gob: make robust when decoding a struct with non-struct data.
-* gobuilder: add -cmd for user-specified build command,
- add -rev= flag to build specific revision and exit,
- fix bug that caused old revisions to be rebuilt.
-* godoc: change default filter file name to "",
- don't use quadratic algorithm to filter paths,
- show "Last update" info for directory listings.
-* http: new redirect test,
- URLEscape now escapes all reserved characters as per the RFC.
-* nacl: fix zero-length writes.
-* net/dict: parse response correctly (thanks Fazlul Shahriar).
-* netchan: add a cross-connect test,
- handle closing of channels,
- provide a method (Importer.Errors()) to recover protocol errors.
-* os: make Open() O_APPEND flag work on windows (thanks Alex Brainman),
- make RemoveAll() work on windows (thanks Alex Brainman).
-* pkg/Makefile: disable netchan test to fix windows build (thanks Alex Brainman).
-* regexp: delete Iter methods.
-* runtime: better panic for send to nil channel.
-* strings: fix minor bug in LastIndexFunc (thanks Roger Peppe).
-* suffixarray: a package for creating suffixarray-based indexes.
-* syscall: Use vsyscall for syscall.Gettimeofday and .Time on linux amd64.
-* test: fix NaCl build.
-* windows: fix netchan test by using 127.0.0.1.
-</pre>
-
-<h3 id="2010-09-15">2010-09-15</h3>
-
-<pre>
-This release includes a language change: the lower bound of a subslice may
-now be omitted, in which case the value will default to 0.
-For example, s[0:10] may now be written as s[:10], and s[0:] as s[:].
-
-The release also includes important bug fixes for the ARM architecture,
-as well as the following fixes and changes:
-
-* 5g: register allocation bugs
-* 6c, 8c: show line numbers in -S output
-* 6g, 6l, 8g, 8l: move read-only data to text segment
-* 6l, 8l: make etext accurate; introduce rodata, erodata.
-* arm: fix build bugs.
- make libcgo build during OS X cross-compile
- remove reference to deleted file syntax/slice.go
- use the correct stat syscalls
- work around reg allocator bug in 5g
-* bufio: add UnreadRune.
-* build: avoid bad environment interactions
- fix build for tiny
- generate, clean .exe files on Windows (thanks Joe Poirier)
- test for _WIN32, not _MINGW32 (thanks Joe Poirier)
- work with GNU Make 3.82 (thanks Jukka-Pekka Kekkonen)
-* cgo: add typedef for uintptr in generated headers
- silence warning for C call returning const pointer
-* codereview: convert email address to lower case before checking CONTRIBUTORS
-* crypto/tls: don't return an error from Close()
-* doc/tutorial: update for slice changes.
-* exec: separate LookPath implementations for unix/windows (thanks Joe Poirier)
-* exp/draw/x11: allow clean shutdown when the user closes the window.
-* exp/draw: clip destination rectangle to the image bounds.
- fast path for drawing overlapping image.RGBAs.
- fix double-counting of pt.Min for the src and mask points.
- reintroduce the MouseEvent.Nsec timestamp.
- rename Context to Window, and add a Close method.
-* exp/debug: preliminary support for 'copy' function (thanks Sebastien Binet)
-* fmt.Fscan: use UnreadRune to preserve data across calls.
-* gc: better printing of named constants, func literals in errors
- many bug fixes
- fix line number printing with //line directives
- fix symbol table generation on windows (thanks Alex Brainman)
- implement comparison rule from spec change 33abb649cb63
- implement new slice spec (thanks Scott Lawrence)
- make string x + y + z + ... + w efficient
- more accurate line numbers for ATEXT
- remove &[10]int -> []int conversion
-* go-mode.el: fix highlighting for 'chan' type (thanks Scott Lawrence)
-* godoc: better support for directory trees for user-supplied paths
- use correct delay time (bug fix)
-* gofmt, go/printer: update internal estimated position correctly
-* goinstall: warn when package name starts with http:// (thanks Scott Lawrence)
-* http: check https certificate against host name
- do not cache CanonicalHeaderKey (thanks Jukka-Pekka Kekkonen)
-* image: change a ColorImage's minimum point from (0, 0) to (-1e9, -1e9).
- introduce Intersect and Union rectangle methods.
-* ld: handle quoted spaces in package path (thanks Dan Sinclair)
-* libcgo: fix NaCl build.
-* libmach: fix build on arm host
- fix new thread race with Linux
-* math: make portable Tan(Pi/2) return NaN
-* misc/dashboard/builder: gobuilder, a continuous build client
-* net: disable tests for functions not available on windows (thanks Alex Brainman)
-* netchan: make -1 unlimited, as advertised.
-* os, exec: rename argv0 to name
-* path: add IsAbs (thanks Ivan Krasin)
-* runtime: fix bug in tracebacks
- fix crash trace on amd64
- fix windows build (thanks Alex Brainman)
- use manual stack for garbage collection
-* spec: add examples for slices with omitted index expressions.
- allow omission of low slice bound (thanks Scott Lawrence)
-* syscall: fix windows Gettimeofday (thanks Alex Brainman)
-* test(arm): disable zerodivide.go because compilation fails.
-* test(windows): disable tests that cause the build to fail (thanks Joe Poirier)
-* test/garbage/parser: sync with recent parser changes
-* test: Add test for //line
- Make gccgo believe that the variables can change.
- Recognize gccgo error messages.
- Reduce race conditions in chan/nonblock.go.
- Run garbage collector before testing malloc numbers.
-* websocket: Add support for secure WebSockets (thanks Jukka-Pekka Kekkonen)
-* windows: disable unimplemented tests (thanks Joe Poirier)
-</pre>
-
-<h3 id="2010-09-06">2010-09-06</h3>
-
-<pre>
-This release includes the syntactic modernization of more than 100 files in /test,
-and these additions, changes, and fixes:
-* 6l/8l: emit DWARF in macho.
-* 8g: use FCHS, not FMUL, for minus float.
-* 8l: emit DWARF in ELF,
- suppress emitting DWARF in Windows PE (thanks Alex Brainman).
-* big: added RatString, some simplifications.
-* build: create bin and pkg directories as needed; drop from hg,
- delete Make.386 Make.amd64 Make.arm (obsoleted by Make.inc),
- fix cgo with -j2,
- let pkg/Makefile coordinate building of Go commands,
- never use quietgcc in Make.pkg,
- remove more references to GOBIN and GOROOT (thanks Christian Himpel).
-* codereview: Fix uploading for Mercurial 1.6.3 (thanks Evan Shaw),
- consistent indent, cut dead code,
- fix hang on standard hg commands,
- print status when tasks take longer than 30 seconds,
- really disable codereview when not available,
- upload files in parallel (5x improvement on large CLs).
-* crypto/hmac: make Sum idempotent (thanks Jukka-Pekka Kekkonen).
-* doc: add links to more German docs,
- add round-robin flag to io2010 balance example,
- fix a bug in the example in Constants subsection (thanks James Fysh),
- various changes for validating HTML (thanks Scott Lawrence).
-* fmt: delete erroneous sentence about return value for Sprint*.
-* gc: appease bison version running on FreeBSD builder,
- fix spurious syntax error.
-* go/doc: use correct escaper for URL.
-* go/printer: align ImportPaths in ImportDecls (thanks Scott Lawrence).
-* go/typechecker: 2nd step towards augmenting AST with full type information.
-* gofmt: permit omission of first index in slice expression.
-* goinstall: added -a flag to mean "all remote packages" (thanks Scott Lawrence),
- assume go binaries are in path (following new convention),
- use https for Google Code checkouts.
-* gotest: allow make test of cgo packages (without make install).
-* http: add Date to server, Last-Modified and If-Modified-Since to file server,
- add PostForm function to post url-encoded key/value data,
- obscure passwords in return value of URL.String (thanks Scott Lawrence).
-* image: introduce Config type and DecodeConfig function.
-* libcgo: update Makefile to use Make.inc.
-* list: update comment to state that the zero value is ready to use.
-* math: amd64 version of Sincos (thanks Charles L. Dorian).
-* misc/bash: add *.go completion for gofmt (thanks Scott Lawrence).
-* misc/emacs: make _ a word symbol (thanks Scott Lawrence).
-* misc: add zsh completion (using compctl),
- syntax highlighting for Fraise.app (OS X) (thanks Vincent Ambo).
-* net/textproto: Handle multi-line responses (thanks Evan Shaw).
-* net: add LookupMX (thanks Corey Thomasson).
-* netchan: Fix race condition in test,
- rather than 0, make -1 mean infinite (a la strings.Split et al),
- use acknowledgements on export send.
- new methods Sync and Drain for clean teardown.
-* regexp: interpret all Go characer escapes \a \b \f \n \r \t \v.
-* rpc: fix bug that caused private methods to attempt to be registered.
-* runtime: Correct commonType.kind values to match compiler,
- add GOOS, GOARCH; fix FuncLine,
- special case copy, equal for one-word interface values (thanks Kyle Consalus).
-* scanner: fix incorrect reporting of error in Next (thanks Kyle Consalus).
-* spec: clarify that arrays must be addressable to be sliceable.
-* template: fix space handling around actions.
-* test/solitaire: an exercise in backtracking and string conversions.
-* test: Recognize gccgo error messages and other fixes.
-* time: do not crash in String on nil Time.
-* tutorial: regenerate HTML to pick up change to progs/file.go.
-* websocket: fix missing Sec-WebSocket-Protocol on server response (thanks Jukka-Pekka Kekkonen).
-</pre>
-
-<h3 id="2010-08-25">2010-08-25</h3>
-
-<pre>
-This release includes changes to the build system that will likely require you
-to make changes to your environment variables and Makefiles.
-
-All environment variables are now optional:
- - $GOOS and $GOARCH are now optional; their values should now be inferred
- automatically by the build system,
- - $GOROOT is now optional, but if you choose not to set it you must run
- 'gomake' instead of 'make' or 'gmake' when developing Go programs
- using the conventional Makefiles,
- - $GOBIN remains optional and now defaults to $GOROOT/bin;
- if you wish to use this new default, make sure it is in your $PATH
- and that you have removed the existing binaries from $HOME/bin.
-
-As a result of these changes, the Go Makefiles have changed. If your Makefiles
-inherit from the Go Makefiles, you must change this line:
- include ../../Make.$(GOARCH)
-to this:
- include ../../Make.inc
-
-This release also removes the deprecated functions in regexp and the
-once package. Any code that still uses them will break.
-See the notes from the last release for details:
- http://golang.org/doc/devel/release.html#2010-08-11
-
-Other changes:
-* 6g: better registerization for slices, strings, interface values
-* 6l: line number information in DWARF format
-* build: $GOBIN defaults to $GOROOT/bin,
- no required environment variables
-* cgo: add C.GoStringN (thanks Eric Clark).
-* codereview: fix issues with leading tabs in CL descriptions,
- do not send "Abandoned" mail if the CL has not been mailed.
-* crypto/ocsp: add missing Makefile.
-* crypto/tls: client certificate support (thanks Mikkel Krautz).
-* doc: update gccgo information for recent changes.
- fix errors in Effective Go.
-* fmt/print: give %p priority, analogous to %T,
- honor Formatter in Print, Println.
-* gc: fix parenthesization check.
-* go/ast: facility for printing AST nodes,
- first step towards augmenting AST with full type information.
-* go/printer: do not modify tabwriter.Escape'd text.
-* gofmt: do not modify multi-line string literals,
- print AST nodes by setting -ast flag.
-* http: fix typo in http.Request documentation (thanks Scott Lawrence)
- parse query string always, not just in GET
-* image/png: support 16-bit color.
-* io: ReadAtLeast now errors if min > len(buf).
-* jsonrpc: use `error: null` for success, not `error: ""`.
-* libmach: implement register fetch for 32-bit x86 kernel.
-* net: make IPv6 String method standards-compliant (thanks Mikio Hara).
-* os: FileInfo.Permission() now returns uint32 (thanks Scott Lawrence),
- implement env using native Windows API (thanks Alex Brainman).
-* reflect: allow PtrValue.PointTo(nil).
-* runtime: correct line numbers for .goc files,
- fix another stack split bug,
- fix freebsd/386 mmap.
-* syscall: regenerate syscall/z* files for linux/386, linux/amd64, linux/arm.
-* tabwriter: Introduce a new flag StripEscape.
-* template: fix handling of space around actions,
- vars preceded by white space parse correctly (thanks Roger Peppe).
-* test: add test case that crashes gccgo.
-* time: parse no longer requires minutes for time zone (thanks Jan H. Hosang)
-* yacc: fix bounds check in error recovery.
-</pre>
-
-<h3 id="2010-08-11">2010-08-11</h3>
-
-<pre>
-This release introduces some package changes. You may need to change your
-code if you use the once, regexp, image, or exp/draw packages.
-
-The type Once has been added to the sync package. The new sync.Once will
-supersede the functionality provided by the once package. We intend to remove
-the once package after this release. See:
- http://golang.org/pkg/sync/#Once
-All instances of once in the standard library have been replaced with
-sync.Once. Reviewing these changes may help you modify your existing code.
-The relevant changeset:
- http://code.google.com/p/go/source/detail?r=fa2c43595119
-
-A new set of methods has been added to the regular expression package, regexp.
-These provide a uniformly named approach to discovering the matches of an
-expression within a piece of text; see the package documentation for details:
- http://golang.org/pkg/regexp/
-These new methods will, in a later release, replace the old methods for
-matching substrings. The following methods are deprecated:
- Execute (use FindSubmatchIndex)
- ExecuteString (use FindStringSubmatchIndex)
- MatchStrings(use FindStringSubmatch)
- MatchSlices (use FindSubmatch)
- AllMatches (use FindAll; note that n<0 means 'all matches'; was n<=0)
- AllMatchesString (use FindAllString; note that n<0 means 'all matches'; was n<=0)
-(Plus there are ten new methods you didn't know you wanted.)
-Please update your code to use the new routines before the next release.
-
-An image.Image now has a Bounds rectangle, where previously it ranged
-from (0, 0) to (Width, Height). Loops that previously looked like:
- for y := 0; y < img.Height(); y++ {
- for x := 0; x < img.Width(); x++ {
- // Do something with img.At(x, y)
- }
- }
-should instead be:
- b := img.Bounds()
- for y := b.Min.Y; y < b.Max.Y; y++ {
- for x := b.Min.X; x < b.Max.X; x++ {
- // Do something with img.At(x, y)
- }
- }
-The Point and Rectangle types have also moved from exp/draw to image.
-
-Other changes:
-* arm: bugfixes and syscall (thanks Kai Backman).
-* asn1: fix incorrect encoding of signed integers (thanks Nicholas Waples).
-* big: fixes to bitwise functions (thanks Evan Shaw).
-* bytes: add IndexRune, FieldsFunc and To*Special (thanks Christian Himpel).
-* encoding/binary: add complex (thanks Roger Peppe).
-* exp/iterable: add UintArray (thanks Anschel Schaffer-Cohen).
-* godoc: report Status 404 if a pkg or file is not found.
-* gofmt: better reporting for unexpected semicolon errors.
-* html: new package, an HTML tokenizer.
-* image: change image representation from slice-of-slices to linear buffer,
- introduce Decode and RegisterFormat,
- introduce Transparent and Opaque,
- replace Width and Height by Bounds, add the Point and Rect types.
-* libbio: fix Bprint to address 6g issues with large data structures.
-* math: fix amd64 Hypot (thanks Charles L. Dorian).
-* net/textproto: new package, with example net/dict.
-* os: fix ForkExec() handling of envv == nil (thanks Alex Brainman).
-* png: grayscale support (thanks Mathieu Lonjaret).
-* regexp: document that backslashes are the escape character.
-* rpc: catch errors from ReadResponseBody.
-* runtime: memory free fix (thanks Alex Brainman).
-* template: add ParseFile method to template.Template.
-* test/peano: use directly recursive type def.
-</pre>
-
-<h3 id="2010-08-04">2010-08-04</h3>
-
-<pre>
-This release includes a change to os.Open (and co.). The file permission
-argument has been changed to a uint32. Your code may require changes - a simple
-conversion operation at most.
-
-Other changes:
-* amd64: use segment memory for thread-local storage.
-* arm: add gdb support to android launcher script,
- bugfixes (stack clobbering, indices),
- disable another flaky test,
- remove old qemu dependency from gotest.
-* bufio: introduce Peek.
-* bytes: added test case for explode with blank string (thanks Scott Lawrence).
-* cgo: correct multiple return value function invocations (thanks Christian Himpel).
-* crypto/x509: unwrap Subject Key Identifier (thanks Adam Langley).
-* gc: index bounds tests and other fixes.
-* gofmt/go/parser: strengthen syntax checks.
-* goinstall: check for error from exec.*Cmd.Wait() (thanks Alex Brainman).
-* image/png: use image-specific methods for checking opacity.
-* image: introduce Gray and Gray16 types,
- remove the named colors except for Black and White.
-* json: object members must have a value (thanks Anthony Martin).
-* misc/vim: highlight misspelled words only in comments (thanks Christian Himpel).
-* os: Null device (thanks Peter Mundy).
-* runtime: do not fall through in SIGBUS/SIGSEGV.
-* strings: fix Split("", "", -1) (thanks Scott Lawrence).
-* syscall: make go errors not clash with windows errors (thanks Alex Brainman).
-* test/run: diff old new,
-* websocket: correct challenge response (thanks Tarmigan Casebolt),
- fix bug involving spaces in header keys (thanks Bill Neubauer).
-</pre>
-
-<h3 id="2010-07-29">2010-07-29</h3>
-
-<pre>
-* 5g: more soft float support and several bugfixes.
-* asn1: Enumerated, Flag and GeneralizedTime support.
-* build: clean.bash to check that GOOS and GOARCH are set.
-* bytes: add IndexFunc and LastIndexFunc (thanks Fazlul Shahriar),
- add Title.
-* cgo: If CC is set in environment, use it rather than "gcc",
- use new command line syntax: -- separates cgo flags from gcc flags.
-* codereview: avoid crash if no config,
- don't run gofmt with an empty file list,
- make 'hg submit' work with Mercurial 1.6.
-* crypto/ocsp: add package to parse OCSP responses.
-* crypto/tls: add client-side SNI support and PeerCertificates.
-* exp/bignum: delete package - functionality subsumed by package big.
-* fmt.Print: fix bug in placement of spaces introduced when ...T went in.
-* fmt.Scanf: handle trailing spaces.
-* gc: fix smaller-than-pointer-sized receivers in interfaces,
- floating point precision/normalization fixes,
- graceful exit on seg fault,
- import dot shadowing bug,
- many fixes including better handling of invalid input,
- print error detail about failure to open import.
-* gccgo_install.html: add description of the port to RTEMS (thanks Vinu Rajashekhar).
-* gobs: fix bug in singleton arrays.
-* godoc: display synopses for all packages that have some kind of documentation..
-* gofmt: fix some linebreak issues.
-* http: add https client support (thanks Fazlul Shahriar),
- write body when content length unknown (thanks James Whitehead).
-* io: MultiReader and MultiWriter (thanks Brad Fitzpatrick),
- fix another race condition in Pipes.
-* ld: many fixes including better handling of invalid input.
-* libmach: correct handling of .5 files with D_REGREG addresses.
-* linux/386: use Xen-friendly ELF TLS instruction sequence.
-* mime: add AddExtensionType (thanks Yuusei Kuwana).
-* misc/vim: syntax file recognizes constants like 1e9 (thanks Petar Maymounkov).
-* net: TCPConn.SetNoDelay, back by popular demand.
-* net(windows): fix crashing Read/Write when passed empty slice on (thanks Alex Brainman),
- implement LookupHost/Port/SRV (thanks Wei Guangjing),
- properly handle EOF in (*netFD).Read() (thanks Alex Brainman).
-* runtime: fix bug introduced in revision 4a01b8d28570 (thanks Alex Brainman),
- rename cgo2c, *.cgo to goc2c, *.goc (thanks Peter Mundy).
-* scanner: better comment.
-* strings: add Title.
-* syscall: add ForkExec, Syscall12 on Windows (thanks Daniel Theophanes),
- improve windows errno handling (thanks Alex Brainman).
-* syscall(windows): fix FormatMessage (thanks Peter Mundy),
- implement Pipe() (thanks Wei Guangjing).
-* time: fix parsing of minutes in time zones.
-* utf16(windows): fix cyclic dependency when testing (thanks Peter Mundy).
-</pre>
-
-<h3 id="2010-07-14">2010-07-14</h3>
-
-<pre>
-This release includes a package change. In container/vector, the Iter method
-has been removed from the Vector, IntVector, and StringVector types. Also, the
-Data method has been renamed to Copy to better express its actual behavior.
-Now that Vector is just a slice, any for loops ranging over v.Iter() or
-v.Data() can be changed to range over v instead.
-
-Other changes:
-* big: Improvements to Rat.SetString (thanks Evan Shaw),
- add sign, abs, Rat.IsInt.
-* cgo: various bug fixes.
-* codereview: Fix for Mercurial >= 1.6 (thanks Evan Shaw).
-* crypto/rand: add Windows implementation (thanks Peter Mundy).
-* crypto/tls: make HTTPS servers easier,
- add client OCSP stapling support.
-* exp/eval: converted from bignum to big (thanks Evan Shaw).
-* gc: implement new len spec, range bug fix, optimization.
-* go/parser: require that '...' parameters are followed by a type.
-* http: fix ParseURL to handle //relative_path properly.
-* io: fix SectionReader Seek to seek backwards (thanks Peter Mundy).
-* json: Add HTMLEscape (thanks Micah Stetson).
-* ld: bug fixes.
-* math: amd64 version of log (thanks Charles L. Dorian).
-* mime/multipart: new package to parse multipart MIME messages
- and HTTP multipart/form-data support.
-* os: use TempFile with default TempDir for test files (thanks Peter Mundy).
-* runtime/tiny: add docs for additional VMs, fix build (thanks Markus Duft).
-* runtime: better error for send/recv on nil channel.
-* spec: clarification of channel close(),
- lock down some details about channels and select,
- restrict when len(x) is constant,
- specify len/cap for nil slices, maps, and channels.
-* windows: append .exe to binary names (thanks Joe Poirier).
-</pre>
-
-<h3 id="2010-07-01">2010-07-01</h3>
-
-<pre>
-This release includes some package changes that may require changes to
-client code.
-
-The Split function in the bytes and strings packages has been changed.
-The count argument, which limits the size of the return, previously treated
-zero as unbounded. It now treats 0 as 0, and will return an empty slice.
-To request unbounded results, use -1 (or some other negative value).
-The new Replace functions in bytes and strings share this behavior.
-This may require you change your existing code.
-
-The gob package now allows the transmission of non-struct values at the
-top-level. As a result, the rpc and netchan packages have fewer restrictions
-on the types they can handle. For example, netchan can now share a chan int.
-
-The release also includes a Code Walk: "Share Memory By Communicating".
-It describes an idiomatic Go program that uses goroutines and channels:
- http://golang.org/doc/codewalk/sharemem/
-
-There is now a Projects page on the Go Dashboard that lists Go programs,
-tools, and libraries:
- http://godashboard.appspot.com/project
-
-Other changes:
-* 6a, 6l: bug fixes.
-* bytes, strings: add Replace.
-* cgo: use slash-free relative paths for .so references.
-* cmath: correct IsNaN for argument cmplx(Inf, NaN) (thanks Charles L. Dorian).
-* codereview: allow multiple email addresses in CONTRIBUTORS.
-* doc/codewalk: add Share Memory By Communicating.
-* exp/draw/x11: implement the mapping from keycodes to keysyms.
-* fmt: Printf: fix bug in handling of %#v, allow other verbs for slices
- Scan: fix handling of EOFs.
-* gc: bug fixes and optimizations.
-* gob: add DecodeValue and EncodeValue,
- add support for complex numbers.
-* goinstall: support for Bazaar+Launchpad (thanks Gustavo Niemeyer).
-* io/ioutil: add TempFile for Windows (thanks Peter Mundy).
-* ld: add -u flag to check safe bits; discard old -u, -x flags.
-* math: amd64 versions of Exp and Fabs (thanks Charles L. Dorian).
-* misc/vim: always override filetype detection for .go files.
-* net: add support for DNS SRV requests (thanks Kirklin McDonald),
- initial attempt to implement Windows version (thanks Alex Brainman).
-* netchan: allow chan of basic types now that gob can handle such,
- eliminate the need for a pointer value in Import and Export.
-* os/signal: only catch all signals if os/signal package imported.
-* regexp: bug fix: need to track whether match begins with fixed prefix.
-* rpc: allow non-struct args and reply (they must still be pointers).
-* runtime: bug fixes and reorganization.
-* strconv: fix bugs in floating-point and base 2 conversions
-* syscall: add syscall_bsd.go to zsycall_freebsd_386.go (thanks Peter Mundy),
- add socketpair (thanks Ivan Krasin).
-* time: implement time zones for Windows (thanks Alex Brainman).
-* x509: support non-self-signed certs.
-</pre>
-
-<h3 id="2010-06-21">2010-06-21</h3>
-
-<pre>
-This release includes a language change. The "..." function parameter form is
-gone; "...T" remains. Typically, "...interface{}" can be used instead of "...".
-
-The implementation of Printf has changed in a way that subtly affects its
-handling of the fmt.Stringer interface. You may need to make changes to your
-code. For details, see:
- https://groups.google.com/group/golang-nuts/msg/6fffba90a3e3dc06
-
-The reflect package has been changed. If you have code that uses reflect,
-it will need to be updated. For details, see:
- https://groups.google.com/group/golang-nuts/msg/7a93d07c590e7beb
-
-Other changes:
-* 8l: correct test for sp == top of stack in 8l -K code.
-* asn1: allow '*' in PrintableString.
-* bytes.Buffer.ReadFrom: fix bug.
-* codereview: avoid exception in match (thanks Paolo Giarrusso).
-* complex divide: match C99 implementation.
-* exp/draw: small draw.drawGlyphOver optimization.
-* fmt: Print*: reimplement to switch on type first,
- Scanf: improve error message when input does not match format.
-* gc: better error messages for interface failures, conversions, undefined symbols.
-* go/scanner: report illegal escape sequences.
-* gob: substitute slice for map.
-* goinstall: process dependencies for package main (thanks Roger Peppe).
-* gopack: add S flag to force marking a package as safe,
- simplify go metadata code.
-* html: sync testdata/webkit to match WebKit tip.
-* http: reply to Expect 100-continue requests automatically (thanks Brad Fitzpatrick).
-* image: add an Alpha16 type.
-* ld: pad Go symbol table out to page boundary (fixes cgo crash).
-* misc/vim: reorganize plugin to be easier to use (thanks James Whitehead).
-* path: add Base, analogous to Unix basename.
-* pkg/Makefile: allow DISABLE_NET_TESTS=1 to disable network tests.
-* reflect: add Kind, Type.Bits, remove Int8Type, Int8Value, etc.
-* runtime: additional Windows support (thanks Alex Brainman),
- correct fault for 16-bit divide on Leopard,
- fix 386 signal handler bug.
-* strconv: add AtofN, FtoaN.
-* string: add IndexFunc and LastIndexFunc (thanks Roger Peppe).
-* syslog: use local network for tests.
-</pre>
-
-<h3 id="2010-06-09">2010-06-09</h3>
-
-<pre>
-This release contains many fixes and improvements, including several
-clarifications and consolidations to the Language Specification.
-
-The type checking rules around assignments and conversions are simpler but more
-restrictive: assignments no longer convert implicitly from *[10]int to []int
-(write x[0:] instead of &x), and conversions can no longer change the names of
-types inside composite types.
-
-The fmt package now includes flexible type-driven (fmt.Scan) and
-format-driven (fmt.Scanf) scanners for all basic types.
-
-* big: bug fix for Quo aliasing problem.
-* bufio: change ReadSlice to match description.
-* cgo: bug fixes.
-* doc: add Google I/O talk and programs,
- codereview + Mercurial Queues info (thanks Peter Williams).
-* exp/draw: Draw fast paths for the Over operator,
- add Rectangle.Eq and Point.In, fix Rectangle.Clip (thanks Roger Peppe).
-* fmt: Scan fixes and improvements.
-* gc: backslash newline is not a legal escape sequence in strings,
- better error message when ~ operator is found,
- fix export of complex types,
- new typechecking rules.
-* go/parser: correct position of empty statement ';'.
-* gofmt: fix test script.
-* goinstall: use 'git pull' instead of 'git checkout' (thanks Michael Hoisie).
-* http: add Head function for making HTTP HEAD requests,
- handle status 304 correctly.
-* image: add Opaque method to the image types.
- make Color.RGBA return 16 bit color instead of 32 bit color.
-* io/ioutil: add TempFile.
-* math: Pow special cases and additional tests (thanks Charles L. Dorian).
-* netchan: improve closing and shutdown.
-* os: implement os.FileInfo.*time_ns for windows (thanks Alex Brainman).
-* os/signal: correct the regexp for finding Unix signal names (thanks Vinu Rajashekhar).
-* regexp: optimizations (thanks Kyle Consalus).
-* runtime: fix printing -Inf (thanks Evan Shaw),
- finish pchw -> tiny, added gettime for tiny (thanks Daniel Theophanes).
-* spec: clean-ups and consolidation.
-* syscall: additional Windows compatibility fixes (thanks Alex Brainman).
-* test/bench: added regex-dna-parallel.go (thanks Kyle Consalus).
-* vector: type-specific Do functions now take f(type) (thanks Michael Hoisie).
-</pre>
-
-<h3 id="2010-05-27">2010-05-27</h3>
-
-<pre>
-A sizeable release, including standard library improvements and a slew of
-compiler bug fixes. The three-week interval was largely caused by the team
-preparing for Google I/O.
-
-* big: add Rat type (thanks Evan Shaw),
- new features, much performance tuning, cleanups, and more tests.
-* bignum: deprecate by moving into exp directory.
-* build: allow MAKEFLAGS to be set outside the build scripts (thanks Christopher Wedgwood).
-* bytes: add Trim, TrimLeft, TrimRight, and generic functions (thanks Michael Hoisie).
-* cgo: fix to permit cgo callbacks from init code.
-* cmath: update range of Phase and Polar due to signed zero (thanks Charles L. Dorian).
-* codereview: work better with mq (thanks Peter Williams).
-* compress: renamings
- NewDeflater -> NewWriter
- NewInflater -> NewReader
- Deflater -> Compressor
- Inflater -> Decompressor
-* exp/draw/x11: respect $XAUTHORITY,
- treat $DISPLAY the same way x-go-bindings does.
-* exp/draw: fast path for glyph images, other optimizations,
- fix Rectangle.Canon (thanks Roger Peppe).
-* fmt: Scan, Scanln: Start of a simple scanning API in the fmt package,
- fix Printf crash when given an extra nil argument (thanks Roger Peppe).
-* gc: better error when computing remainder of non-int (thanks Evan Shaw),
- disallow middot in Go programs,
- distinguish array, slice literal in error messages,
- fix shift/reduce conflict in go.y export syntax,
- fix unsafe.Sizeof on ideal constants,
- handle use of builtin function outside function call,
- many other bug fixes.
-* gob: add support for maps,
- add test for indirect maps, slices, arrays.
-* godoc: collect package comments from all package files.
-* gofmt: don't lose mandatory semicolons,
- exclude test w/ illegal syntax from test cases,
- fix printing of labels.
-* http: prevent crash if remote server is not responding with "HTTP/".
-* json: accept escaped slash in string scanner (thanks Michael Hoisie),
- fix array -> non-array decoding.
-* libmach: skip __nl_symbol_ptr section on OS X.
-* math: amd64 versions of Fdim, Fmax, Fmin,
- signed zero Sqrt special case (thanks Charles L. Dorian).
-* misc/kate: convert isn't a built in function (thanks Evan Shaw).
-* net: implement BindToDevice,
- implement raw sockets (thanks Christopher Wedgwood).
-* netFD: fix race between Close and Read/Write (thanks Michael Hoisie).
-* os: add Chtimes function (thanks Brad Fitzpatrick).
-* pkg/Makefile: add netchan to standard package list.
-* runtime: GOMAXPROCS returns previous value,
- allow large map values,
- avoid allocation for fixed strings,
- correct tracebacks for nascent goroutines, even closures,
- free old hashmap pieces during resizing.
-* spec: added imaginary literal to semicolon rules (was missing),
- fix and clarify syntax of conversions,
- simplify section on channel types,
- other minor tweaks.
-* strconv: Btoui64 optimizations (thanks Kyle Consalus).
-* strings: use copy instead of for loop in Map (thanks Kyle Consalus).
-* syscall: implement BindToDevice (thanks Christopher Wedgwood),
- add Utimes on Darwin/FreeBSD, add Futimes everywhere,
- regenerate syscalls for some platforms.
-* template: regularize name lookups of interfaces, pointers, and methods.
-</pre>
-
-<h3 id="2010-05-04">2010-05-04</h3>
-
-<pre>
-In this release we renamed the Windows OS target from 'mingw' to 'windows'.
-If you are currently building for 'mingw' you should set GOOS=windows instead.
-
-* 5l, 6l, 8l, runtime: make -s binaries work.
-* 5l, 6l, 8l: change ELF header so that strip doesn't destroy binary.
-* 8l: fix absolute path detection on Windows.
-* big: new functions, optimizations, and cleanups,
- add bitwise methods for Int (thanks Evan Shaw).
-* bytes: Change IndexAny to look for UTF-8 encoded characters.
-* darwin: bsdthread_create can fail; print good error.
-* fmt: %T missing print <nil> for nil (thanks Christopher Wedgwood).
-* gc: many fixes.
-* misc/cgo/gmp: fix bug in SetString.
-* net: fix resolv.conf EOF without newline bug (thanks Christopher Wedgwood).
-* spec: some small clarifications (no language changes).
-* syscall: add EWOULDBLOCK to sycall_nacl.go,
- force O_LARGEFILE in Linux open system call,
- handle EOF on pipe - special case on Windows (thanks Alex Brainman),
- mingw Sleep (thanks Joe Poirier).
-* test/bench: import new fasta C reference, update Go, optimizations.
-* test: test of static initialization (fails).
-* vector: use correct capacity in call to make.
-* xml: allow text segments to end at EOF.
-</pre>
-
-<h3 id="2010-04-27">2010-04-27</h3>
-
-<pre>
-This release includes a new Codelab that illustrates the construction of a
-simple wiki web application:
- http://golang.org/doc/codelab/wiki/
-
-It also includes a Codewalk framework for documenting code. See:
- http://golang.org/doc/codewalk/
-
-Other changes:
-* 6g: fix need for parens around array index expression.
-* 6l, 8l: include ELF header in PT_LOAD mapping for text segment.
-* arm: add android runner script,
- support for printing floats.
-* big: implemented Karatsuba multiplication,
- many fixes and improvements (thanks Evan Shaw).
-* bytes: add Next method to Buffer, simplify Read,
- shuffle implementation, making WriteByte 50% faster.
-* crypto/tls: simpler implementation of record layer.
-* exp/eval: fixes (thanks Evan Shaw).
-* flag: eliminate unnecessary structs.
-* gc: better windows support,
- cmplx typecheck bug fix,
- more specific error for statements at top level.
-* go/parser: don't require unnecessary parens.
-* godoc: exclude duplicate entries (thanks Andrei Vieru),
- use int64 for timestamps (thanks Christopher Wedgwood).
-* gofmt: fine-tune stripping of parentheses,
-* json: Marshal, Unmarshal using new scanner,
- preserve field name case by default,
- scanner, Compact, Indent, and tests,
- support for streaming.
-* libmach: disassemble MOVLQZX correctly.
-* math: more special cases for signed zero (thanks Charles L. Dorian).
-* net: add Pipe,
- fix bugs in packStructValue (thanks Michael Hoisie),
- introduce net.Error interface.
-* os: FileInfo: regularize the types of some fields,
- create sys_bsd.go (thanks Giles Lean),
- mingw bug fixes (thanks Alex Brainman).
-* reflect: add FieldByNameFunc (thanks Raif S. Naffah),
- implement Set(nil), SetValue(nil) for PtrValue and MapValue.
-* regexp: allow escaping of any punctuation.
-* rpc/jsonrpc: support for jsonrpc wire encoding.
-* rpc: abstract client and server encodings,
- add Close() method to rpc.Client.
-* runtime: closures, defer bug fix for Native Client,
- rename cgo2c, *.cgo to goc2c, *.goc to avoid confusion with real cgo.
- several other fixes.
-* scanner: implement Peek() to look at the next char w/o advancing.
-* strings: add ReadRune to Reader, add FieldsFunc (thanks Kyle Consalus).
-* syscall: match linux Setsid function signature to darwin,
- mingw bug fixes (thanks Alex Brainman).
-* template: fix handling of pointer inside interface.
-* test/bench: add fannkuch-parallel.go (thanks Kyle Consalus),
- pidigits ~10% performance win by using adds instead of shifts.
-* time: remove incorrect time.ISO8601 and add time.RFC3339 (thanks Micah Stetson).
-* utf16: add DecodeRune, EncodeRune.
-* xml: add support for XML marshalling embedded structs (thanks Raif S. Naffah),
- new "innerxml" tag to collect inner XML.
-</pre>
-
-<h3 id="2010-04-13">2010-04-13</h3>
-
-<pre>
-This release contains many changes:
-
-* 8l: add DOS stub to PE binaries (thanks Evan Shaw).
-* cgo: add //export.
-* cmath: new complex math library (thanks Charles L. Dorian).
-* docs: update to match current coding style (thanks Christopher Wedgwood).
-* exp/eval: fix example and add target to Makefile (thanks Evan Shaw).
-* fmt: change behaviour of format verb %b to match %x when negative (thanks Andrei Vieru).
-* gc: compile s == "" as len(s) == 0,
- distinguish fatal compiler bug from error+exit,
- fix alignment on non-amd64,
- good syntax error for defer func() {} - missing fina (),
- implement panic and recover,
- zero unnamed return values on entry if func has defer.
-* goyacc: change to be reentrant (thanks Roger Peppe).
-* io/ioutil: fix bug in ReadFile when Open succeeds but Stat fails.
-* kate: update for recent language changes (thanks Evan Shaw).
-* libcgo: initial mingw port work - builds but untested (thanks Joe Poirier).
-* math: new functions and special cases (thanks Charles L. Dorian)
-* net: use chan bool instead of chan *netFD to avoid cycle.
-* netchan: allow client to send as well as receive.
-* nntp: new package, NNTP client (thanks Conrad Meyer).
-* os: rename os.Dir to os.FileInfo.
-* rpc: don't log normal EOF,
- fix ServeConn to block as documented.
-* runtime: many bug fixes, better ARM support.
-* strings: add IndexRune, Trim, TrimLeft, TrimRight, etc (thanks Michael Hoisie).
-* syscall: implement some mingw syscalls required by os (thanks Alex Brainman).
-* test/bench: add k-nucleotide-parallel (thanks Kyle Consalus).
-* Unicode: add support for Turkish case mapping.
-* xgb: move from the main repository to http://code.google.com/p/x-go-binding/
-</pre>
-
-<h3 id="2010-03-30">2010-03-30</h3>
-
-<pre>
-This release contains three language changes:
-
-1. Accessing a non-existent key in a map is no longer a run-time error.
-It now evaluates to the zero value for that type. For example:
- x := myMap[i] is now equivalent to: x, _ := myMap[i]
-
-2. It is now legal to take the address of a function's return value.
-The return values are copied back to the caller only after deferred
-functions have run.
-
-3. The functions panic and recover, intended for reporting and recovering from
-failure, have been added to the spec:
- http://golang.org/doc/go_spec.html#Handling_panics
-In a related change, panicln is gone, and panic is now a single-argument
-function. Panic and recover are recognized by the gc compilers but the new
-behavior is not yet implemented.
-
-The ARM build is broken in this release; ARM users should stay at release.2010-03-22.
-
-Other changes:
-* bytes, strings: add IndexAny.
-* cc/ld: Add support for #pragma dynexport,
- Rename dynld to dynimport throughout. Cgo users will need to rerun cgo.
-* expvar: default publishings for cmdline, memstats
-* flag: add user-defined flag types.
-* gc: usual bug fixes
-* go/ast: generalized ast filtering.
-* go/printer: avoid reflect in print.
-* godefs: fix handling of negative constants.
-* godoc: export pprof debug information, exported variables,
- support for filtering of command-line output in -src mode,
- use http GET for remote search instead of rpc.
-* gofmt: don't convert multi-line functions into one-liners,
- preserve newlines in multiline selector expressions (thanks Risto Jaakko Saarelma).
-* goinstall: include command name in error reporting (thanks Andrey Mirtchovski)
-* http: add HandleFunc as shortcut to Handle(path, HandlerFunc(func))
-* make: use actual dependency for install
-* math: add J1, Y1, Jn, Yn, J0, Y0 (Bessel functions) (thanks Charles L. Dorian)
-* prof: add pprof from google-perftools
-* regexp: don't return non-nil *Regexp if there is an error.
-* runtime: add Callers,
- add malloc sampling, pprof interface,
- add memory profiling, more statistics to runtime.MemStats,
- implement missing destroylock() (thanks Alex Brainman),
- more malloc statistics,
- run all finalizers in a single goroutine,
- Goexit runs deferred calls.
-* strconv: add Atob and Btoa,
- Unquote could wrongly return a nil error on error (thanks Roger Peppe).
-* syscall: add IPV6 constants,
- add syscall_bsd.go for Darwin and other *BSDs (thanks Giles Lean),
- implement SetsockoptString (thanks Christopher Wedgwood).
-* websocket: implement new protocol (thanks Fumitoshi Ukai).
-* xgb: fix request length and request size (thanks Firmansyah Adiputra).
-* xml: add CopyToken (thanks Kyle Consalus),
- add line numbers to syntax errors (thanks Kyle Consalus),
- use io.ReadByter in place of local readByter (thanks Raif S. Naffah).
-</pre>
-
-<h3 id="2010-03-22">2010-03-22</h3>
-
-<pre>
-With this release we announce the launch of the Go Blog:
- http://blog.golang.org/
-The first post is a brief update covering what has happened since the launch.
-
-This release contains some new packages and functionality, and many fixes:
-* 6g/8g: fix issues with complex data types, other bug fixes.
-* Makefiles: refactored to make writing external Makefiles easier.
-* crypto/rand: new package.
-* godoc: implemented command-line search via RPC,
- improved comment formatting: recognize URLs.
-* gofmt: more consistent formatting of const/var decls.
-* http: add Error helper function,
- add ParseQuery (thanks Petar Maymounkov),
- change RawPath to mean raw path, not raw everything-after-scheme.
-* image/jpeg: fix typos.
-* json: add MarshalIndent (accepts user-specified indent string).
-* math: add Gamma function (thanks Charles L. Dorian).
-* misc/bbedit: support for cmplx, real, imag (thanks Anthony Starks).
-* misc/vim: add new complex types, functions and literals.
-* net: fix IPMask.String not to crash on all-0xff mask.
-* os: drop File finalizer after normal Close.
-* runtime: add GOROOT and Version,
- lock finalizer table accesses.
-* sha512: add sha384 (truncated version) (thanks Conrad Meyer).
-* syscall: add const ARCH, analogous to OS.
-* syscall: further additions to mingw port (thanks Alex Brainman).
-* template: fixed html formatter []byte input bug.
-* utf16: new package.
-* version.bash: cope with ancient Mercurial.
-* websocket: use URL.RawPath to construct WebSocket-Location: header.
-</pre>
-
-<h3 id="2010-03-15">2010-03-15</h3>
-
-<pre>
-This release includes a language change: support for complex numbers.
- http://golang.org/doc/go_spec.html#Imaginary_literals
- http://golang.org/doc/go_spec.html#Complex_numbers
-There is no library support as yet.
-
-This release also includes the goinstall command-line tool.
- http://golang.org/cmd/goinstall/
- http://groups.google.com/group/golang-nuts/t/f091704771128e32
-
-* 5g/6g/8g: fix double function call in slice.
-* arm: cleanup build warnings. (thanks Dean Prichard)
-* big: fix mistakes with probablyPrime.
-* bufio: add WriteRune.
-* bytes: add ReadRune and WriteRune to bytes.Buffer.
-* cc: stack split bug fix.
-* crypto: add SHA-224 to sha256, add sha512 package. (thanks Conrad Meyer)
-* crypto/ripemd160: new package. (thanks Raif S. Naffah)
-* crypto/rsa: don't use safe primes.
-* gc: avoid fixed length buffer cleanbuf. (thanks Dean Prichard)
- better compilation of floating point +=
- fix crash on complicated arg to make slice.
- remove duplicate errors, give better error for I.(T)
-* godoc: support for multiple packages in a directory, other fixes.
-* gofmt: bug fixes.
-* hash: add Sum64 interface.
-* hash/crc32: add Update function.
-* hash/crc64: new package implementing 64-bit CRC.
-* math: add ilogb, logb, remainder. (thanks Charles L. Dorian)
-* regexp: add ReplaceAllFunc, ReplaceAllStringFunc.
-* runtime: clock garbage collection on bytes allocated, not pages in use.
-* strings: make Split(s, "", n) faster. (thanks Spring Mc)
-* syscall: minimal mingw version of syscall. (thanks Alex Brainman)
-* template: add ParseFile, MustParseFile.
-</pre>
-
-<h3 id="2010-03-04">2010-03-04</h3>
-
-<pre>
-There is one language change: the ability to convert a string to []byte or
-[]int. This deprecates the strings.Bytes and strings.Runes functions.
-You can convert your existing sources using these gofmt commands:
- gofmt -r 'strings.Bytes(x) -> []byte(x)' -w file-or-directory-list
- gofmt -r 'strings.Runes(x) -> []int(x)' -w file-or-directory-list
-After running these you might need to delete unused imports of the "strings"
-package.
-
-Other changes and fixes:
-* 6l/8l/5l: add -r option
-* 8g: make a[byte(x)] truncate x
-* codereview.py: fix for compatibility with hg >=1.4.3
-* crypto/blowfish: new package (thanks Raif S. Naffah)
-* dashboard: more performance tuning
-* fmt: use String method in %q to get the value to quote.
-* gofmt: several cosmetic changes
-* http: fix handling of Connection: close, bug in http.Post
-* net: correct DNS configuration,
- fix network timeout boundary condition,
- put [ ] around IPv6 addresses for Dial.
-* path: add Match,
- fix bug in Match with non-greedy stars (thanks Kevin Ballard)
-* strings: delete Bytes, Runes (see above)
-* tests: an Eratosthenesque concurrent prime sieve (thanks Anh Hai Trinh)
-</pre>
-
-<h3 id="2010-02-23">2010-02-23</h3>
-
-<pre>
-This release is mainly bug fixes and a little new code.
-There are no language changes.
-
-6g/5g/8g: bug fixes
-8a/8l: Added FCMOVcc instructions (thanks Evan Shaw and Charles Dorian)
-crypto/x509: support certificate creation
-dashboard: caching to avoid datastore queries
-exec: add dir argument to Run
-godoc: bug fixes and code cleanups
-http: continued implementation and bug fixes (thanks Petar Maymounkov)
-json: fix quoted strings in Marshal (thanks Sergei Skorobogatov)
-math: more functions, test cases, and benchmarks (thanks Charles L. Dorian)
-misc/bbedit: treat predeclared identifiers as "keywords" (thanks Anthony Starks)
-net: disable UDP server test (flaky on various architectures)
-runtime: work around Linux kernel bug in futex,
- pchw is now tiny
-sync: fix to work on armv5 (thanks Dean Prichard)
-websocket: fix binary frame size decoding (thanks Timo Savola)
-xml: allow unquoted attribute values in non-Strict mode (thanks Amrut Joshi)
- treat bool as value in Unmarshal (thanks Michael Hoisie)
-</pre>
-
-<h3 id="2010-02-17">2010-02-17</h3>
-
-<pre>
-There are two small language changes:
-* NUL bytes may be rejected in souce files, and the tools do reject them.
-* Conversions from string to []int and []byte are defined but not yet implemented.
-
-Other changes and fixes:
-* 5a/6a/8a/5c/6c/8c: remove fixed-size arrays for -I and -D options (thanks Dean Prichard)
-* 5c/6c/8c/5l/6l/8l: add -V flag to display version number
-* 5c/6c/8c: use "cpp" not "/bin/cpp" for external preprocessor (thanks Giles Lean)
-* 8a/8l: Added CMOVcc instructions (thanks Evan Shaw)
-* 8l: pe executable building code changed to include import table for kernel32.dll functions (thanks Alex Brainman)
-* 5g/6g/8g: bug fixes
-* asn1: bug fixes and additions (incl marshalling)
-* build: fix build for Native Client, Linux/ARM
-* dashboard: show benchmarks, add garbage collector benchmarks
-* encoding/pem: add marshalling support
-* exp/draw: fast paths for a nil mask
-* godoc: support for directories outside $GOROOT
-* http: sort header keys when writing Response or Request to wire (thanks Petar Maymounkov)
-* math: special cases and new functions (thanks Charles Dorian)
-* mime: new package, used in http (thanks Michael Hoisie)
-* net: dns bug fix - use random request id
-* os: finalize File, to close fd.
-* path: make Join variadic (thanks Stephen Weinberg)
-* regexp: optimization bug fix
-* runtime: misc fixes and optimizations
-* syscall: make signature of Umask on OS X, FreeBSD match Linux. (thanks Giles Lean)
-</pre>
-
-<h3 id="2010-02-04">2010-02-04</h3>
-
-<pre>
-There is one language change: support for ...T parameters:
- http://golang.org/doc/go_spec.html#Function_types
-
-You can now check build status on various platforms at the Go Dashboard:
- http://godashboard.appspot.com
-
-* 5l/6l/8l: several minor fixes
-* 5a/6a/8a/5l/6l/8l: avoid overflow of symb buffer (thanks Dean Prichard)
-* compress/gzip: gzip deflater (i.e., writer)
-* debug/proc: add mingw specific build stubs (thanks Joe Poirier)
-* exp/draw: separate the source-point and mask-point in Draw
-* fmt: handle nils safely in Printf
-* gccgo: error messages now match those of gc
-* godoc: several fixes
-* http: bug fixes, revision of Request/Response (thanks Petar Maymounkov)
-* image: new image.A type to represent anti-aliased font glyphs
- add named colors (e.g. image.Blue), suitable for exp/draw
-* io: fixed bugs in Pipe
-* malloc: merge into package runtime
-* math: fix tests on FreeBSD (thanks Devon H. O'Dell)
- add functions; update tests and special cases (thanks Charles L. Dorian)
-* os/signal: send SIGCHLDs to Incoming (thanks Chris Wedgwood)
-* reflect: add StringHeader to reflect
-* runtime: add SetFinalizer
-* time: Sleep through interruptions (thanks Chris Wedgwood)
- add RFC822 formats
- experimental implemenation of Ticker using two goroutines for all tickers
-* xml: allow underscores in XML element names (thanks Michael Hoisie)
- allow any scalar type in xml.Unmarshal
-</pre>
-
-<h3 id="2010-01-27">2010-01-27</h3>
-
-<pre>
-There are two small language changes: the meaning of chan <- chan int
-is now defined, and functions returning functions do not need to
-parenthesize the result type.
-
-There is one significant implementation change: the compilers can
-handle multiple packages using the same name in a single binary.
-In the gc compilers, this comes at the cost of ensuring that you
-always import a particular package using a consistent import path.
-In the gccgo compiler, the cost is that you must use the -fgo-prefix
-flag to pass a unique prefix (like the eventual import path).
-
-5a/6a/8a: avoid use of fixed-size buffers (thanks Dean Prichard)
-5g, 6g, 8g: many minor bug fixes
-bufio: give Writer.WriteString same signature as bytes.Buffer.WriteString.
-container/list: PushFrontList, PushBackList (thanks Jan Hosang)
-godoc: trim spaces from search query (thanks Christopher Wedgwood)
-hash: document that Sum does not change state, fix crypto hashes
-http: bug fixes, revision of Request/Response (thanks Petar Maymounkov)
-math: more handling of IEEE 754 special cases (thanks Charles Dorian)
-misc/dashboard: new build dashboard
-net: allow UDP broadcast,
- use /etc/hosts to resolve names (thanks Yves Junqueira, Michael Hoisie)
-netchan: beginnings of new package for connecting channels across a network
-os: allow FQDN in Hostname test (thanks Icarus Sparry)
-reflect: garbage collection bug in Call
-runtime: demo of Go on raw (emulated) hw in runtime/pchw,
- performance fix on OS X
-spec: clarify meaning of chan <- chan int,
- func() func() int is allowed now,
- define ... T (not yet implemented)
-template: can use interface values
-time: fix for +0000 time zone,
- more robust tick.Stop.
-xgb: support for authenticated connections (thanks Firmansyah Adiputra)
-xml: add Escape (thanks Stephen Weinberg)
-</pre>
-
-<h3 id="2010-01-13">2010-01-13</h3>
-
-<pre>
-This release is mainly bug fixes with a little new code.
-There are no language changes.
-
-build: $GOBIN should no longer be required in $PATH (thanks Devon H. O'Dell),
- new package target "make bench" to run benchmarks
-8g: faster float -> uint64 conversion (thanks Evan Shaw)
-5g, 6g, 8g:
- clean opnames.h to avoid stale errors (thanks Yongjian Xu),
- a handful of small compiler fixes
-5g, 6g, 8g, 5l, 6l, 8l: ignore $GOARCH, which is implied by name of tool
-6prof: support for writing input files for google-perftools's pprof
-asn1: fix a few structure-handling bugs
-cgo: many bug fixes (thanks Devon H. O'Dell)
-codereview: repeated "hg mail" sends "please take another look"
-gob: reserve ids for future expansion
-godoc: distinguish HTML generation from plain text HTML escaping (thanks Roger Peppe)
-gofmt: minor bug fixes, removed -oldprinter flag
-http: add CanonicalPath (thanks Ivan Krasin),
- avoid header duplication in Response.Write,
- correctly escape/unescape URL sections
-io: new interface ReadByter
-json: better error, pointer handling in Marshal (thanks Ivan Krasin)
-libmach: disassembly of FUCOMI, etc (thanks Evan Shaw)
-math: special cases for most functions and 386 hardware Sqrt (thanks Charles Dorian)
-misc/dashboard: beginning of a build dashboard at godashboard.appspot.com.
-misc/emacs: handling of new semicolon rules (thanks Austin Clements),
- empty buffer bug fix (thanks Kevin Ballard)
-misc/kate: highlighting improvements (tahnks Evan Shaw)
-os/signal: add signal names: signal.SIGHUP, etc (thanks David Symonds)
-runtime: preliminary Windows support (thanks Hector Chu),
- preemption polling to reduce garbage collector pauses
-scanner: new lightweight scanner package
-template: bug fix involving spaces before a delimited block
-test/bench: updated timings
-time: new Format, Parse functions
-</pre>
-
-<h3 id="2010-01-05">2010-01-05</h3>
-
-<pre>
-This release is mainly bug fixes. There are no language changes.
-
-6prof: now works on 386
-8a, 8l: add FCOMI, FCOMIP, FUCOMI, and FUCOMIP (thanks Evan Shaw)
-big: fix ProbablyPrime on small numbers
-container/vector: faster []-based implementation (thanks Jan Mercl)
-crypto/tls: extensions and Next Protocol Negotiation
-gob: one encoding bug fix, one decoding bug fix
-image/jpeg: support for RST markers
-image/png: support for transparent paletted images
-misc/xcode: improved support (thanks Ken Friedenbach)
-net: return nil Conn on error from Dial (thanks Roger Peppe)
-regexp: add Regexp.NumSubexp (thanks Peter Froehlich)
-syscall: add Nanosleep on FreeBSD (thanks Devon H. O'Dell)
-template: can use map in .repeated section
-
-There is now a public road map, in the repository and online
-at <a href="http://golang.org/doc/devel/roadmap.html">http://golang.org/doc/devel/roadmap.html</a>.
-</pre>
-
-<h3 id="2009-12-22">2009-12-22</h3>
-
-<pre>
-Since the last release there has been one large syntactic change to
-the language, already discussed extensively on this list: semicolons
-are now implied between statement-ending tokens and newline characters.
-See http://groups.google.com/group/golang-nuts/t/5ee32b588d10f2e9 for
-details.
-
-By default, gofmt now parses and prints the new lighter weight syntax.
-To convert programs written in the old syntax, you can use:
-
- gofmt -oldparser -w *.go
-
-Since everything was being reformatted anyway, we took the opportunity to
-change the way gofmt does alignment. Now gofmt uses tabs at the start
-of a line for basic code alignment, but it uses spaces for alignment of
-interior columns. Thus, in an editor with a fixed-width font, you can
-choose your own tab size to change the indentation, and no matter what
-tab size you choose, columns will be aligned properly.
-
-
-In addition to the syntax and formatting changes, there have been many
-smaller fixes and updates:
-
-6g,8g,5g: many bug fixes, better registerization,
- build process fix involving mkbuiltin (thanks Yongjian Xu),
- method expressions for concrete types
-8l: support for Windows PE files (thanks Hector Chu)
-bytes: more efficient Buffer handling
-bytes, strings: new function Fields (thanks Andrey Mirtchovski)
-cgo: handling of enums (thanks Moriyoshi Koizumi),
- handling of structs with bit fields, multiple files (thanks Devon H. O'Dell),
- installation of .so to non-standard locations
-crypto/sha256: new package for SHA 256 (thanks Andy Davis)
-encoding/binary: support for slices of fixed-size values (thanks Maxim Ushakov)
-exp/vector: experimental alternate vector representation (thanks Jan Mercl)
-fmt: %p for chan, map, slice types
-gob: a couple more bug fixes
-http: support for basic authentication (thanks Ivan Krasin)
-image/jpeg: basic JPEG decoder
-math: correct handling of Inf and NaN in Pow (thanks Charles Dorian)
-misc/bash: completion file for bash (thanks Alex Ray)
-os/signal: support for handling Unix signals (thanks David Symonds)
-rand: Zipf-distributed random values (thanks William Josephson)
-syscall: correct error return bug on 32-bit machines (thanks Christopher Wedgwood)
-syslog: new package for writing to Unix syslog daemon (thanks Yves Junqueira)
-template: will automatically invoke niladic methods
-time: new ISO8601 format generator (thanks Ben Olive)
-xgb: converted generator to new syntax (thanks Tor Andersson)
-xml: better mapping of tag names to Go identifiers (thanks Kei Son),
- better handling of unexpected EOF (thanks Arvindh Rajesh Tamilmani)
-</pre>
-
-<h3 id="2009-12-09">2009-12-09</h3>
-
-<pre>
-Since the last release there are two changes to the language:
-
-* new builtin copy(dst, src) copies n = min(len(dst), len(src))
- elements to dst from src and returns n. It works correctly
- even if dst and src overlap. bytes.Copy is gone.
- Convert your programs using:
- gofmt -w -r 'bytes.Copy(d, s) -> copy(d, s)' *.go
-
-* new syntax x[lo:] is shorthand for x[lo:len(x)].
- Convert your programs using:
- gofmt -w -r 'a[b:len(a)] -> a[b:]' *.go
-
-In addition, there have been many smaller fixes and updates:
-
-* 6g/8g/5g: many bug fixes
-* 8g: fix 386 floating point stack bug (thanks Charles Dorian)
-* all.bash: now works even when $GOROOT has spaces (thanks Sergio Luis O. B. Correia),
- starting to make build work with mingw (thanks Hector Chu),
- FreeBSD support (thanks Devon O'Dell)
-* big: much faster on 386.
-* bytes: new function IndexByte, implemented in assembly
- new function Runes (thanks Peter Froehlich),
- performance tuning in bytes.Buffer.
-* codereview: various bugs fixed
-* container/vector: New is gone; just declare a Vector instead.
- call Resize to set len and cap.
-* cgo: many bug fixes (thanks Eden Li)
-* crypto: added MD4 (thanks Chris Lennert),
- added XTEA (thanks Adrian O'Grady).
-* crypto/tls: basic client
-* exp/iterable: new functions (thanks Michael Elkins)
-* exp/nacl: native client tree builds again
-* fmt: preliminary performance tuning
-* go/ast: more powerful Visitor (thanks Roger Peppe)
-* gob: a few bug fixes
-* gofmt: better handling of standard input, error reporting (thanks Fazlul Shahriar)
- new -r flag for rewriting programs
-* gotest: support for Benchmark functions (thanks Trevor Strohman)
-* io: ReadFile, WriteFile, ReadDir now in separate package io/ioutil.
-* json: new Marshal function (thanks Michael Hoisie),
- better white space handling (thanks Andrew Skiba),
- decoding into native data structures (thanks Sergey Gromov),
- handling of nil interface values (thanks Ross Light).
-* math: correct handling of sin/cos of large angles
-* net: better handling of Close (thanks Devon O'Dell and Christopher Wedgwood)
- support for UDP broadcast (thanks Jonathan Wills),
- support for empty packets
-* rand: top-level functions now safe to call from multiple goroutines
-(thanks Roger Peppe).
-* regexp: a few easy optimizations
-* rpc: better error handling, a few bug fixes
-* runtime: better signal handling on OS X, malloc fixes,
- global channel lock is gone.
-* sync: RWMutex now allows concurrent readers (thanks Péter Szabó)
-* template: can use maps as data (thanks James Meneghello)
-* unicode: updated to Unicode 5.2.
-* websocket: new package (thanks Fumitoshi Ukai)
-* xgb: preliminary X Go Bindings (thanks Tor Andersson)
-* xml: fixed crash (thanks Vish Subramanian)
-* misc: bbedit config (thanks Anthony Starks),
- kate config (thanks Evan Shaw)
-</pre>
+<p><a href="/doc/go_spec.html#Label_scopes">Unused labels are now illegal</a>, just as unused local variables are.</p>
+
+<h3 id="r57.pkg">Packages</h3>
+
+<p>
+<a href="/pkg/gob/">Package gob</a> will now encode and decode values of types that implement the
+<a href="/pkg/gob/#GobEncoder">GobEncoder</a> and
+<a href="/pkg/gob/#GobDecoder">GobDecoder</a> interfaces. This allows types with unexported
+fields to transmit self-consistent descriptions; examples include
+<a href="/pkg/big/#Int.GobDecode">big.Int</a> and <a href="/pkg/big/#Rat.GobDecode">big.Rat</a>.
+</p>
+
+<p>
+<a href="/pkg/http/">Package http</a> has been redesigned.
+For clients, there are new
+<a href="/pkg/http/#Client">Client</a> and <a href="/pkg/http/#Transport">Transport</a>
+abstractions that give more control over HTTP details such as headers sent
+and redirections followed. These abstractions make it easy to implement
+custom clients that add functionality such as <a href="http://code.google.com/p/goauth2/source/browse/oauth/oauth.go">OAuth2</a>.
+For servers, <a href="/pkg/http/#ResponseWriter">ResponseWriter</a>
+has dropped its non-essential methods.
+The Hijack and Flush methods are no longer required;
+code can test for them by checking whether a specific value implements
+<a href="/pkg/http/#Hijacker">Hijacker</a> or <a href="/pkg/http/#Flusher">Flusher</a>.
+The RemoteAddr and UsingTLS methods are replaced by <a href="/pkg/http/#Request">Request</a>'s
+RemoteAddr and TLS fields.
+The SetHeader method is replaced by a Header method;
+its result, of type <a href="/pkg/http/#Header">Header</a>,
+implements Set and other methods.
+</p>
+
+<p>
+<a href="/pkg/net/">Package net</a>
+drops the <code>laddr</code> argument from <a href="/pkg/net/#Conn.Dial">Dial</a>
+and drops the <code>cname</code> return value
+from <a href="/pkg/net/#LookupHost">LookupHost</a>.
+The implementation now uses <a href="/cmd/cgo/">cgo</a> to implement
+network name lookups using the C library getaddrinfo(3)
+function when possible. This ensures that Go and C programs
+resolve names the same way and also avoids the OS X
+application-level firewall.
+</p>
+
+<p>
+<a href="/pkg/os/">Package os</a>
+introduces simplified <a href="/pkg/os/#File.Open">Open</a>
+and <a href="/pkg/os/#File.Create">Create</a> functions.
+The original Open is now available as <a href="/pkg/os/#File.OpenFile">OpenFile</a>.
+The final three arguments to <a href="/pkg/os/#Process.StartProcess">StartProcess</a>
+have been replaced by a pointer to a <a href="/pkg/os/#ProcAttr">ProcAttr</a>.
+</p>
+
+<p>
+<a href="/pkg/reflect/">Package reflect</a> has been redesigned.
+<a href="/pkg/reflect/#Type">Type</a> is now an interface that implements
+all the possible type methods.
+Instead of a type switch on a Type <code>t</code>, switch on <code>t.Kind()</code>.
+<a href="/pkg/reflect/#Value">Value</a> is now a struct value that
+implements all the possible value methods.
+Instead of a type switch on a Value <code>v</code>, switch on <code>v.Kind()</code>.
+Typeof and NewValue are now called <a href="/pkg/reflect/#Type.TypeOf">TypeOf</a> and <a href="/pkg/reflect/#Value.ValueOf">ValueOf</a>
+To create a writable Value, use <code>New(t).Elem()</code> instead of <code>Zero(t)</code>.
+See <a href="http://code.google.com/p/go/source/detail?r=843855f3c026">the change description</a>
+for the full details.
+The new API allows a more efficient implementation of Value
+that avoids many of the allocations required by the previous API.
+</p>
+
+<p>
+Remember that gofix will handle the bulk of the rewrites
+necessary for these changes to package APIs.
+</p>
+
+<h3 id="r57.tool">Tools</h3>
+
+<p><a href="/cmd/gofix/">Gofix</a>, a new command, is described above.</p>
+
+<p>
+<a href="/cmd/gotest/">Gotest</a> is now a Go program instead of a shell script.
+The new <code>-test.short</code> flag in combination with package testing's Short function
+allows you to write tests that can be run in normal or “short” mode;
+all.bash runs tests in short mode to reduce installation time.
+The Makefiles know about the flag: use <code>make testshort</code>.
+</p>
+
+<p>
+The run-time support now implements CPU and memory profiling.
+Gotest's new
+<a href="/cmd/gotest/"><code>-test.cpuprofile</code> and
+<code>-test.memprofile</code> flags</a> make it easy to
+profile tests.
+To add profiling to your web server, see the <a href="/pkg/http/pprof/">http/pprof</a>
+documentation.
+For other uses, see the <a href="/pkg/runtime/pprof/">runtime/pprof</a> documentation.
+</p>
+
+<h2 id="r56">r56 (released 2011/03/16)</h2>
+
+<p>
+The r56 release was the first stable release and corresponds to
+<code><a href="weekly.html#2011-03-07">weekly.2011-03-07.1</a></code>.
+The numbering starts at 56 because before this release,
+what we now consider weekly snapshots were called releases.
+</p>
--- /dev/null
+<!-- Weekly Snapshot History -->
+
+<p>This page summarizes the changes between tagged weekly snapshots of Go.
+For full details, see the <a href="http://code.google.com/p/go/source/list">Mercurial change log</a>.</p>
+
+<p>Weekly snapshots occur often and may not be stable.
+If stability of API and code is more important than having the
+latest features, use the <a href="release.html">official releases</a> instead.</p>
+
+<p>To update to a specific snapshot, use:</p>
+
+<pre>
+hg pull
+hg update weekly.<i>YYYY-MM-DD</i>
+</pre>
+
+<h2 id="2011-04-27">2011-04-27 (<a href="release.html#r57">base for r57</a>)</h2>
+
+<pre>
+This release includes revisions to the reflect package to make it more
+efficient, after the last weekly’s major API update. If your code uses reflect
+it may require further changes, not all of which can be made automatically by
+gofix. For the full details of the change, see
+ http://codereview.appspot.com/4435042
+Also, the Typeof and NewValue functions have been renamed to TypeOf and ValueOf.
+
+Other changes:
+* 5c: make alignment rules match 5g, just like 6c matches 6g.
+* 8g, 8l: fix "set but not used" gcc error (thanks Fazlul Shahriar).
+* all-qemu.bash: remove DISABLE_NET_TESTS.
+* build: remove DISABLE_NET_TESTS.
+* builder: build multiple targets in parallel.
+* cgo: avoid "incompatible pointer type" warning (thanks Albert Strasheim).
+* codereview: add 'hg undo' command, various other fixes.
+* compress/flate: dictionary support.
+* compress/zlib: add FDICT flag in Reader/Writer (thanks Ross Light).
+* container/heap: fix circular dependency in test.
+* crypto/openpgp: better handling of keyrings.
+* crypto/rsa: support > 3 primes.
+* crypto/tls: add server-side OCSP stapling support.
+* crypto/x509: memorize chain building.
+* crypto: move certificate verification into x509.
+* dashboard: build most recent revision first.
+* doc: mention make version in install.html.
+* expvar: add Func for functions that return values that are JSON marshalable.
+* fmt: decrease recursion depth in tests to permit them to run under gccgo,
+ tweak the doc for %U.
+* gc: allow complex types to be receiver types (thanks Robert Hencke),
+ correct handling of unexported method names in embedded interfaces,
+ explain why invalid receiver types are invalid,
+ fix copy([]int, string) error message (thanks Quan Yong Zhai),
+ fix 'invalid recursive type' error (thanks Lorenzo Stoakes),
+ many bug fixes.
+* go spec: attempt at clarifying language for "append",
+ for map types, mention indexing operations.
+* go/types: update for export data format change.
+* gob: fix handling of indirect receivers for GobDecoders,
+ fix trivial bug in map marshaling,
+ have errorf always prefix the message with "gob: ",
+ test case for indirection to large field,
+ use new Implements and AssignableTo methods in reflect,
+ when decoding a string, allocate a string, not a []byte.
+* gobuilder: permit builders of the form goos-goarch-foo,
+ respect MAKEFLAGS if provided (thanks Dave Cheney).
+* godoc: use "search" input type for search box (thanks Dmitry Chestnykh).
+* gofix: add support for reflect rename.
+* gofmt: add -d (diff) (thanks David Crawshaw),
+ don't crash when rewriting nil interfaces in AST,
+ exclude test case that doesn't compile w/o errors,
+ gofmt test harness bug fix.
+* goinstall: support GOPATH; building and installing outside the Go tree,
+ support building executable commands.
+* gopack: fix prefix bug,
+ preserve safe flag when not adding unsafe objects to archive.
+* gotest: add timing, respect $GOARCH,
+ generate gofmt-compliant code.
+* http/cgi: copy some PATH environment variables to child,
+ improve Location response handling,
+ pass some default environment variables.
+* http/fcgi: new package (thanks Evan Shaw).
+* http: add NewRequest helper,
+ add MultipartForm, ParseMultipartForm, and FormFile to Request,
+ be clear when failing to connect to a proxy,
+ bug fixes and new tests,
+ consume request bodies before replying,
+ don't quote Set-Cookie Domain and Path (thanks Petar Maymounkov),
+ fix IP confusion in TestServerTimeouts,
+ handler timeout support,
+ ServerConn, ClientConn: add real Close (thanks Petar Maymounkov),
+ make Client redirect policy configurable,
+ put a limit on POST size,
+ reverse proxy handler.
+* image/jpeg: add an encoder,
+ decode to a YCbCr image instead of an RGBA image.
+* ioutil: add Discard.
+* json: keep track of error offset in SyntaxError.
+* ld: defend against some broken object files,
+ do not emit empty dwarf pe sections (thanks Alex Brainman),
+ fix 6l -d on Mac, diagnose invalid use of -d,
+ fix Plan 9 symbol table (thanks Anthony Martin),
+ remove MachoLoad limit.
+* make: prevent rm provoking 'text file busy' errors (thanks Lorenzo Stoakes).
+* mime/multipart: add ReadForm for parsing multipart forms,
+ limit line length to prevent abuse.
+* mime: RFC 2231 continuation / non-ASCII support,
+ bunch more tests, few minor parsing fixes.
+* misc/goplay: fix Tab and Shift+Enter in Firefox (thanks Dmitry Chestnykh).
+* net: disable one more external network test,
+ fix EAI_BADFLAGS error on freebsd (thanks Mikio Hara),
+ fix ParseIP (thanks Quan Yong Zhai),
+ fix dialgoogle_test.go (thanks Quan Yong Zhai),
+ try /etc/hosts before loading DNS config (thanks Dmitry Chestnykh),
+ use C library resolver on FreeBSD, Linux, OS X / amd64, 386.
+* os/user: new package to look up users.
+* os: Open with O_APPEND|O_CREATE to append on Windows (thanks Alex Brainman),
+ fix race in ReadAt/WriteAt on Windows (thanks Alex Brainman),
+ turn EPIPE exit into panic.
+* rc/env.bash: fix to build on windows under msys (thanks Joe Poirier).
+* reflect: allow Slice of arrays,
+ fix Copy of arrays (thanks Gustavo Niemeyer),
+ require package qualifiers to match during interface check,
+ add Type.Implements, Type.AssignableTo, Value.CallSlice,
+ make Set match Go.
+* rpc: allow the first argument of a method to be a value rather than a pointer,
+ run benchmarks over HTTP as well as direct network connections.
+* run.bash: remove redundant rebuilds.
+* runtime/plan9: warning remediation for Plan 9 (thanks Lucio De Re),
+* runtime: many bug fixes,
+ fix GOMAXPROCS vs garbage collection bug (thanks Dmitriy Vyukov),
+ fix mkversion to output valid path separators (thanks Peter Mundy),
+ more graceful out-of-memory crash,
+ require package qualifiers to match during interface check,
+ skip functions with no lines when building src line table,
+ turn "too many EPIPE" into real SIGPIPE.
+* src/pkg: make package doc comments consistently start with "Package foo".
+* syscall: Madvise and Mprotect for Linux (thanks Albert Strasheim),
+ Mlock, Munlock, Mlockall, Munlockall on Linux (thanks Albert Strasheim),
+ add BPF support for darwin/386, darwin/amd64 (thanks Mikio Hara),
+ correct Windows CreateProcess input parameters (thanks Alex Brainman),
+ fix Ftruncate under linux/arm5 (thanks Dave Cheney),
+ permit StartProcess to hide the executed program on windows (thanks Vincent Vanackere).
+* test/bench: update timings; moving to new machine.
+* time: support Irix 6 location for zoneinfo files.
+* tutorial: modernize the definition and use of Open,
+ replace the forever loops with finite counts in sieve programs.
+* websocket: include *http.Request in websocket.Conn.
+* xml: Parser hook for non-UTF-8 charset converters.
+</pre>
+
+<h2 id="2011-04-13">2011-04-13</h2>
+
+<pre>
+weekly.2011-04-13
+
+This weekly snapshot includes major changes to the reflect package and the
+os.Open function. Code that uses reflect or os.Open will require updating,
+which can be done mechanically using the gofix tool.
+
+The reflect package's Type and Value types have changed. Type is now an
+interface that implements all the possible type methods. Instead of a type
+switch on a reflect.Type t, switch on t.Kind(). Value is now a struct value
+that implements all the possible value methods. Instead of a type switch on a
+reflect.Value v, switch on v.Kind(). See the change for the full details:
+ http://code.google.com/p/go/source/detail?r=843855f3c026
+
+The os package's Open function has been replaced by three functions:
+ OpenFile(name, flag, perm) // same as old Open
+ Open(name) // same as old Open(name, O_RDONLY, 0)
+ Create(name) // same as old Open(name, O_RDWR|O_TRUNC|O_CREAT, 0666)
+
+To update your code to use the new APIs, run "gofix path/to/code". Gofix can’t
+handle all situations perfectly, so read and test the changes it makes before
+committing them.
+
+Other changes:
+* archive/zip: add func OpenReader, type ReadCloser (thanks Dmitry Chestnykh).
+* asn1: Implement correct marshaling of length octets (thanks Luit van Drongelen).
+* big: don't crash when printing nil ints.
+* bufio: add ReadLine, to replace encoding/line.
+* build: make the build faster, quieter.
+* codereview: automatically port old diffs forward,
+ drop Author: line on self-clpatch,
+ recognize code URL without trailing slash.
+* crypto/block: remove deprecated package.
+* crypto/des: new package implementating DES and TDEA (thanks Yasuhiro Matsumoto).
+* crypto/ecdsa, crypto/rsa: use io.ReadFull to read from random source (thanks Dmitry Chestnykh).
+* crypto/rsa: add 3-prime support,
+ add support for precomputing CRT values,
+ flip the CRT code over so that it matches PKCS#1.
+* crypto/x509: expose complete DER data (thanks Mikkel Krautz).
+* doc: new "Functions" codewalk (thanks John DeNero).
+* doc/roadmap: add sections on tools, packages.
+* fmt: allow %U for unsigned integers.
+* gc: fixes and optimizations.
+* go/printer, gofmt: use blank to separate import rename from import path.
+* go/scanner: better TokenString output.
+* go/types: new Go type hierarchy implementation for AST.
+* godashboard: show packages at launchpad.net (thanks Gustavo Niemeyer).
+* gofix: add -diff, various fixes and helpers.
+* gotest: fix a bug in error handling,
+ fixes for [^.]_test file pattern (thanks Peter Mundy),
+ handle \r\n returned by gomake on Windows (thanks Alex Brainman).
+* gotype: use go/types GcImporter.
+* govet: make name-matching for printf etc. case-insensitive.
+* http: allow override of Content-Type for ServeFile,
+ client gzip support,
+ do not listen on 0.0.0.0 during test,
+ flesh out server Expect handling + tests.
+* image/ycbcr: new package.
+* image: allow "?" wildcards when registering image formats.
+* io: fixes for Read with n > 0, os.EOF (thanks Robert Hencke).
+* ld: correct Plan 9 compiler warnings (thanks Lucio De Re),
+ ELF header function declarations (thanks Lucio De Re),
+ fix Mach-O X86_64_RELOC_SIGNED relocations (thanks Mikkel Krautz),
+ fix Mach-O bss bug (thanks Mikkel Krautz),
+ fix dwarf decoding of strings for struct's fieldnames (thanks Luuk van Dijk),
+ fixes and optimizations (25% faster).
+* log: generalize getting and setting flags and prefix.
+* misc/cgo/life: enable build and test on Windows (thanks Alex Brainman).
+* misc/vim: add plugin with Fmt command (thanks Dmitry Chestnykh),
+ update type highlighting for new reflect package.
+* net: disable multicast tests by default (thanks Dave Cheney),
+ sort records returned by LookupMX (thanks Corey Thomasson).
+* openpgp: Fix improper := shadowing (thanks Gustavo Niemeyer).
+* os: rename Open to OpenFile, add new Open, Create,
+ fix Readdir in Plan 9 (thanks Fazlul Shahriar).
+* os/inotify: use _test for test files, not _obj.
+* pkg/path: enable tests on Windows (thanks Alex Brainman).
+* reflect: new Type and Value API.
+* src/pkg/Makefile: trim per-directory make output except on failure.
+* syscall: Add DT_* and MADV_* constants on Linux (thanks Albert Strasheim),
+ add Mmap, Munmap on Linux, FreeBSD, OS X,
+ fix StartProcess in Plan 9 (thanks Fazlul Shahriar),
+ fix Windows Signaled (thanks Alex Brainman).
+* test/bench: enable build and test on Windows (thanks Alex Brainman).
+</pre>
+
+<h2 id="2011-04-04">2011-04-04</h2>
+
+<pre>
+This release includes changes to the net package. Your code will require
+changes if it uses the Dial or LookupHost functions.
+
+The laddr argument has been removed from net.Dial, and the cname return value
+has been removed from net.LookupHost. The new net.LookupCNAME function can be
+used to find the canonical host for a given name. You can update your
+networking code with gofix.
+
+The gotest shell script has been replaced by a Go program, making testing
+significantly faster.
+
+Other changes:
+* asn1: extensions needed for parsing Kerberos.
+* bufio: Write and WriteString cleanup (thanks Evan Shaw).
+* bytes, strings: simplify Join (thanks Evan Shaw).
+* crypto/cipher: bad CTR IV length now triggers panic.
+* crypto/tls: extend NPN support to the client,
+ added X509KeyPair function to parse a Certificate from memory.
+* crypto/x509: parse Extended Key Usage extension (thanks Mikkel Krautz).
+* debug/gosym: remove need for gotest to run preparatory commands.
+* fmt: implement precision (length of input) values for %q: %.20q.
+* go/parser: fix scoping for local type declarations (thanks Roger Peppe),
+ package name must not be the blank identifier.
+* go/printer, gofmt: remove special case for multi-line raw strings.
+* gopack: add P flag to remove prefix from filename information.
+* gotest: add -test.timeout option,
+ replace the shell script with the compiled program written in go,
+ execute gomake properly on Windows (thanks Alex Brainman).
+* gotry: move into its own directory, separate from gotest.
+* gotype: support for more tests, added one new test.
+* http: add Transport.MaxIdleConnsPerHost,
+ use upper case hex in URL escaping (thanks Matt Jones).
+* httptest: add NewTLSServer.
+* misc/kate: reorganize, remove closed() (thanks Evan Shaw).
+* misc/notepadplus: support for notepad++ (thanks Anthony Starks).
+* net: implement non-blocking connect (thanks Alexey Borzenkov).
+* os: fix MkdirAll("/thisdoesnotexist") (thanks Albert Strasheim),
+ Plan 9 support (thanks Yuval Pavel Zholkover),
+ add a few missing Plan 9 errors (thanks Andrey Mirtchovski),
+ fix FileInfo.Name returned by Stat (thanks David Forsythe).
+* path/filepath.Glob: add an error return,
+ don't drop known matches on error.
+* path/filepath: add support for Plan 9 (thanks Andrey Mirtchovski).
+* scanner: treat line comments like in Go.
+* syscall: Plan 9 support (thanks Yuval Pavel Zholkover),
+ StartProcess Chroot and Credential (thanks Albert Strasheim),
+ add BPF support for freebsd/386, freebsd/amd64 (thanks Mikio Hara),
+ make [Raw]Syscall6 pass 6th arg on linux/386 (thanks Evan Shaw).
+</pre>
+
+<h2 id="2011-03-28">2011-03-28</h2>
+
+<pre>
+This weekly release includes improved support for testing.
+
+Memory and CPU profiling is now available via the gotest tool. Gotest will
+produce memory and CPU profiling data when invoked with the -test.memprofile
+and -test.cpuprofile flags. Run "godoc gotest" for details.
+
+We have also introduced a way for tests to run quickly when an exhaustive test
+is unnecessary. Gotest’s new -test.short flag in combination with the testing
+package’s new Short function allows you to write tests that can be run in
+normal or "short" mode; short mode is now used by all.bash to reduce
+installation time.
+The Makefiles know about the flag - you can just run "make testshort".
+
+Other changes:
+* .hgignore: Ignore all goinstalled packages (thanks Evan Shaw).
+* build: add all-qemu.bash, handful of arm fixes,
+ add support for SWIG, and add two SWIG examples,
+ diagnose Ubuntu's buggy copy of gold,
+ handle broken awk in version.bash (thanks Dave Cheney),
+ reenable clean.bash without gomake (thanks Gustavo Niemeyer).
+* cgo: fix index-out-of-bounds bug.
+* codereview: permit CLs of the form weekly.DATE
+* crypto/ecdsa: truncate hash values.
+* crypto/openpgp: add DSA signature support.
+* dashboard: remove old python/bash builder, update README.
+* doc: explain release and weekly tags in install.html.
+* exec: document dir option for Run (thanks Gustavo Niemeyer).
+* flag: document Nflag function (thanks Fazlul Shahriar).
+* gc: remove interim ... error which rejects valid code.
+* go/ast: implemented NewPackage,
+ merge CaseClause and TypeCaseClause.
+* go/parser: fix memory leak by making a copy of token literals,
+ resolve identifiers properly.
+* go/printer, gofmt: avoid exponential layout algorithm,
+ gofmt: simplify struct formatting and respect line breaks.
+* go/scanner: to interpret line comments with Windows filenames (thanks Alex Brainman).
+* go/token: use array instead of map for token->string table.
+* gob: optimizations to reduce allocations,
+ use pointers in bootstrapType so interfaces behave properly.
+* gobuilder: recognize CLs of the form weekly.DATE.
+* godefs: handle volatile.
+* godoc: add -template flag to specify custom templates,
+ fix path problem for windows (thanks Yasuhiro Matsumoto).
+* gofix: httpserver - rewrite rw.SetHeader to rw.Header.Set.
+* gofmt: add profiling flag.
+* gopprof: fix bug: do not rotate 180 degrees for large scrolls,
+ update list of memory allocation functions.
+* gotest: fix gofmt issue in generated _testmain.go.
+* http: add NewProxyClientConn,
+ avoid crash when asked for multiple file ranges,
+ don't chunk 304 responses,
+ export Transport, add keep-alive support.
+* ld: return > 0 exit code on unsafe import.
+* misc/bbedit: remove closed keyword (thanks Anthony Starks).
+* misc/emacs: gofmt: don't clobber the current buffer on failure.
+* misc/vim: remove 'closed' as a builtin function.
+* net: add FileConn, FilePacketConn, FileListener (thanks Albert Strasheim),
+ don't force epoll/kqueue to wake up in order to add new events,
+ let OS-specific AddFD routine wake up polling thread,
+ use preallocated buffer for epoll and kqueue/kevent.
+* path/filepath: add EvalSymlinks function,
+ fix TestEvalSymlinks when run under symlinked GOROOT.
+* path: work for windows (thanks Yasuhiro Matsumoto).
+* rpc: increase server_test timeout (thanks Gustavo Niemeyer),
+ optimizations to reduce allocations.
+* runtime: fix darwin/amd64 thread VM footprint (thanks Alexey Borzenkov),
+ fix gdb support for goroutines,
+ more stack split fixes,
+ os-specific types and code for setitimer,
+ update defs.h for freebsd-386 (thanks Devon H. O'Dell).
+* strings: Map: avoid allocation when string is unchanged.
+* syscall: GetsockoptInt (thanks Albert Strasheim),
+ StartProcess fixes for windows (thanks Alex Brainman),
+ permit non-blocking syscalls,
+ rename from .sh to .pl, because these files are in Perl.
+* test: enable tests using v, ok := <-ch syntax (thanks Robert Hencke).
+* time: give a helpful message when we can't set the time zone for testing.
+ isolate syscall reference in sys.go.
+</pre>
+
+<h2 id="2011-03-15">2011-03-15</h2>
+
+<pre>
+This week's release introduces a new release tagging scheme. We intend to
+continue with our weekly releases, but have renamed the existing tags from
+"release" to "weekly". The "release" tag will now be applied to one hand-picked
+stable release each month or two.
+
+The revision formerly tagged "release.2011-03-07.1" (now "weekly.2011-03-07.1")
+has been nominated our first stable release, and has been given the tag
+"release.r56". As we tag each stable release we will post an announcement to
+the new golang-announce mailing list:
+ http://groups.google.com/group/golang-announce
+
+You can continue to keep your Go installation updated using "hg update
+release", but now you should only need to update once we tag a new stable
+release, which we will announce here. If you wish to stay at the leading edge,
+you should switch to the weekly tag with "hg update weekly".
+
+
+This weekly release includes significant changes to the language spec and the
+http, os, and syscall packages. Your code may need to be changed. It also
+introduces the new gofix tool.
+
+The closed function has been removed from the language. The syntax for channel
+receives has been changed to return an optional second value, a boolean value
+indicating whether the channel is closed. This code:
+ v := <-ch
+ if closed(ch) {
+ // channel is closed
+ }
+should now be written as:
+ v, ok := <-ch
+ if !ok {
+ // channel is closed
+ }
+
+It is now illegal to declare unused labels, just as it is illegal to declare
+unused local variables.
+
+The new gofix tool finds Go programs that use old APIs and rewrites them to use
+newer ones. After you update to a new Go release, gofix helps make the
+necessary changes to your programs. Gofix will handle the http, os, and syscall
+package changes described below, and we will update the program to keep up with
+future changes to the libraries.
+
+The Hijack and Flush methods have been removed from the http.ResponseWriter
+interface and are accessible via the new http.Hijacker and http.Flusher
+interfaces. The RemoteAddr and UsingTLS methods have been moved from
+http.ResponseWriter to http.Request.
+
+The http.ResponseWriter interface's SetHeader method has been replaced by a
+Header() method that returns the response's http.Header. Caller code needs to
+change. This code:
+ rw.SetHeader("Content-Type", "text/plain")
+should now be written as:
+ rw.Header().Set("Content-Type", "text/plain")
+The os and syscall packages' StartProcess functions now take their final three
+arguments as an *os.ProcAttr and *syscall.ProcAttr values, respectively. This
+code:
+ os.StartProcess(bin, args, env, dir, fds)
+should now be written as:
+ os.StartProcess(bin, args, &os.ProcAttr{Files: fds, Dir: dir, Env: env})
+
+The gob package will now encode and decode values of types that implement the
+gob.GobEncoder and gob.GobDecoder interfaces. This allows types with unexported
+fields to transmit self-consistent descriptions; one instance is big.Int and
+big.Rat.
+
+Other changes:
+* 5l, 6l, 8l: reduce binary size about 40% by omitting symbols for type, string, go.string.
+* 5l, 8l: output missing section symbols (thanks Anthony Martin).
+* 6l, 8l: fix gdb crash.
+* Make.cmd: also clean _test* (thanks Gustavo Niemeyer).
+* big: implemented custom Gob(En/De)coder for Int type.
+* build: remove duplicate dependency in Make.cmd (thanks Robert Hencke),
+ run gotest in misc/cgo/test.
+* codereview.py: don't suggest change -d if user is not CL author (thanks Robert Hencke).
+* compress/lzw: benchmark a range of input sizes.
+* crypto/ecdsa: add package.
+* crypto/elliptic: add the N value of each curve.
+* crypto/openpgp: bug fixes and fix misnamed function.
+* crypto/tls: fix compile error (thanks Dave Cheney).
+* doc: Effective Go: some small cleanups,
+ update FAQ. hello, world is now 1.1MB, down from 1.8MB,
+ update codelab wiki to fix template.Execute argument order.
+* flag: visit the flags in sorted order, for nicer messages.
+* fmt: do not export EOF = -1.
+* fmt: make ScanState.Token more general (thanks Roger Peppe).
+* gc: diagnose unused labels,
+ fix handling of return values named _,
+ include all dependencies in export metadata,
+ make unsafe.Pointer its own kind of type, instead of an equivalent to *any.
+* go/ast, go/parser: populate identifier scopes at parse time.
+* go/ast: add FileSet parameter to ast.Print and ast.Fprint.
+* go/parser: first constant in a constant declaration must have a value.
+* gob: efficiency and reliability fixes.
+* gofmt: remove -trace and -ast flags.
+* goinstall: handle $(GOOS) and $(GOARCH) in filenames,
+ handle .c files with gc when cgo isn't used, and
+ handle .s files with gc (thanks Gustavo Niemeyer).
+* gopack: omit time stamps, makes output deterministic.
+* gotype: commandline tool to typecheck go programs.
+* govet: handle '*' in print format strings.
+* hash: new FNV-1a implementation (thanks Pascal S. de Kloe).
+* http/cgi: child support (e.g. Go CGI under Apache).
+* http: adapt Cookie code to follow IETF draft (thanks Petar Maymounkov),
+ add test for fixed HTTP/1.0 keep-alive issue,
+ don't hit external network in client_test.go,
+ fix transport crash when request URL is nil,
+ rename interface Transport to RoundTripper,
+ run tests even with DISABLE_NET_TESTS=1.
+* httptest: default the Recorder status code to 200 on a Write.
+* io/ioutil: clean-up of ReadAll and ReadFile.
+* ioutil: add NopCloser.
+* ld: preserve symbol sizes during data layout.
+* lib9, libmach: Change GOOS references to GOHOSTOS (thanks Evan Shaw).
+* libmach: correct string comparison to revive 6cov on darwin (thanks Dave Cheney).
+* misc/vim: Add indent script for Vim (thanks Ross Light).
+* net, os, syslog: fixes for Solaris support.
+* net: don't loop to drain wakeup pipe.
+* nm: document -S flag.
+* openpgp: add PublicKey KeyId string accessors.
+* rpc: optimizations, add benchmarks and memory profiling,
+ use httptest.Server for tests (thanks Robert Hencke).
+* runtime: reduce lock contention via wakeup on scheduler unlock,
+ scheduler, cgo reorganization,
+ split non-debugging malloc interface out of debug.go into mem.go.
+* spec: clarify return statement rules.
+* strings: add IndexRune tests, ASCII fast path,
+ better benchmark names; add BenchmarkIndex.
+* syscall: implement Mount and Unmount for linux,
+ implement Reboot for linux.
+* time: fix Time.ZoneOffset documentation (thanks Peter Mundy).
+* tls: move PeerCertificates to ConnectionState.
+</pre>
+
+<h2 id="2011-03-07">2011-03-07 (<a href="release.html#r56">base for r56</a>)</h2>
+
+<pre>
+This release includes changes to the reflect and path packages.
+Code that uses reflect or path may need to be updated.
+
+The reflect package's Value.Addr method has been renamed to Value.UnsafeAddr.
+Code that uses the Addr method will have to call UnsafeAddr instead.
+
+The path package has been split into two packages: path and path/filepath.
+Package path manipulates slash-separated paths, regardless of operating system.
+Package filepath implements the local operating system's native file paths.
+OS-specific functioanlity in pacakge path, such as Walk, moved to filepath.
+
+Other changes:
+* build: fixes and simplifications (thanks Dave Cheney),
+ move $GOBIN ahead of /bin, /usr/bin in build $PATH.
+* bzip2: speed up decompression.
+* cgo: fix dwarf type parsing (thanks Gustavo Niemeyer),
+ put temporary source files in _obj (thanks Roger Peppe),
+ fix bug involving 0-argument callbacks.
+* compress/lzw: optimizations.
+* doc: add FAQ about "implements",
+ add FAQ about large binaries ,
+ add FAQ about stack vs heap allocation,
+ add internationalization to roadmap,
+ describe platform-specific conventions in code.html.
+* fmt: allow recursive calls to Fscan etc (thanks Roger Peppe),
+ make %#p suppress leading 0x.
+* gc, gopack: add some missing flags to the docs.
+* gc: fix init of packages named main (thanks Gustavo Niemeyer),
+* gob: make recursive map and slice types work, and other fixes.
+ tentative support for GobEncoder/GobDecoder interfaces.
+* gobuilder: add -package flag to build external packages and -v for verbose.
+* gofmt: exclude test file that is not legal Go.
+* goinstall: protect against malicious filenames (thanks Roger Peppe).
+* goyacc: provide -p flag to set prefix for names, documentation update.
+* http: add cookie support (thanks Petar Maymounkov),
+ allow handlers to send non-chunked responses,
+ export ParseHTTPVersion,
+ expose Client's Transport,
+ use WriteProxy,
+ rename ClientTransport to Transport.
+* http/cgi: new package.
+* http/httptest: new package.
+* image: add a decoding test for common file formats.
+* io/ioutil: add TempDir.
+* mime/multipart: Header changed from map to MIMEHeader
+* path/filepath: new OS-specific path support (thanks Gustavo Niemeyer).
+* reflect: add PtrTo, add Value.Addr (old Addr is now UnsafeAddr).
+* runtime: use kernel-supplied compare-and-swap on linux/arm.
+* spec: minor clarification of scope rule for functions.
+* sync/atomic: new package to expose atomic operations.
+* syscall: regenerate zerrors_freebsd_amd64.go (thanks Mikio Hara),
+ work around FreeBSD execve kernel bug (thanks Devon H. O'Dell).
+* template: document the delimiters.
+* testing: run GC before each benchmark run (thanks Roger Peppe).
+* unsafe: fix the documentation.
+* websocket: use httptest.Server for tests (thanks Robert Hencke).
+* xml: permit nested directives (thanks Chris Dollin).
+</pre>
+
+<h2 id="2011-02-24">2011-02-24</h2>
+
+<pre>
+This release includes changes to the http package and a small language change.
+Your code will require changes if it manipulates http Headers or omits the
+condition in if statements.
+
+The new http.Header type replaces map[string]string in the Header and Trailer
+fields of http.Request and http.Response.
+A Header value can be manipulated via its Get, Set, Add, and Del methods.
+See http://golang.org/pkg/http/#Header
+
+The condition is now mandatory in if statements.
+Previously it would default to true, as in switch and for statements.
+This code is now illegal:
+ if x := foo(); {
+ // code that is always executed
+ }
+The same effect can be achieved like this:
+ if x := foo(); true {
+ // code
+ }
+Or, in a simpler form:
+ {
+ x := foo()
+ // code
+ }
+
+Other changes:
+* 6l: new -Hwindowsgui flag allows to build windows gui pe (thanks Alex Brainman),
+ pe fixes (thanks Wei Guangjing).
+* 8l, 6l: allow for more os threads to be created on Windows (thanks Alex Brainman),
+* build: reduce the use of subshells in recursive make, and
+ remove unused NaCl conditional from make.bash (thanks Dave Cheney).
+* codereview: fix clpatch with empty diffs (thanks Gustavo Niemeyer).
+* compress/bzip2: add package.
+* compress/lzw: implement a decoder.
+* crypto/openpgp: add package.
+* crypto/rand: add read buffer to speed up small requests (thanks Albert Strasheim).
+* crypto/rsa: left-pad OAEP results when needed.
+* crypto/tls: make protocol negotiation failure fatal.
+* fmt: stop giving characters to the Scan method of Scanner when we hit a newline in Scanln.
+* gc: interface error message fixes,
+ make string const comparison unsigned (thanks Jeff R. Allen).
+* go spec: minor clarification on channel types.
+* go/ast, parser: condition in if statement is mandatory.
+* gob: compute information about a user's type once.
+ protect against pure recursive types.
+* godoc: accept symbolic links as path names provided to -path,
+ add robots.txt, log errors when reading filter files.
+* html: tokenize HTML comments.
+* http: add proxy support (thanks Yasuhiro Matsumoto),
+ implement with net/textproto (thanks Petar Maymounkov),
+ send full URL in proxy requests,
+ introduce start of Client and ClientTransport.
+* image/png: support for more formats (thanks Mikael Tillenius).
+* json: only use alphanumeric tags,
+ use base64 to encode []byte (thanks Roger Peppe).
+* ld: detect stack overflow due to NOSPLIT, drop rpath, support weak symbols.
+* misc/dashboard/builder: talk to hg with utf-8 encoding.
+* misc/dashboard: notify golang-dev on build failure.
+* net: *netFD.Read to return os.EOF on eof under windows (thanks Alex Brainman),
+ add IPv4 multicast to UDPConn (thanks Dave Cheney),
+ more accurate IPv4-in-IPv6 API test (thanks Mikio Hara),
+ reject invalid net:proto network names (thanks Olivier Antoine).
+* netchan: allow use of arbitrary connections (thanks Roger Peppe).
+* os: add ENODATA and ENOTCONN (thanks Albert Strasheim).
+* reflect: add a couple of sentences explaining how Methods operate,
+ add a secret method to ArrayOrSliceType to ensure it's only implemented by arrays and slices,
+ add pointer word to CommonType (placeholder for future work).
+* runtime-gdb.py: gdb pretty printer for go strings properly handles length.
+* runtime: various bug fixes, more complete stack traces,
+ record $GOROOT_FINAL for runtime.GOROOT.
+* spec: delete incorrect mention of selector working on pointer to interface type.
+* sync: add Cond (thanks Gustavo Niemeyer).
+* syscall: add MCL_* flags for mlockall (thanks Albert Strasheim),
+ implement chmod() for win32 (thanks Yasuhiro Matsumoto).
+* test/bench: update timings for new GC.
+* testing: rename cmdline flags to avoid conflicts (thanks Gustavo Niemeyer).
+* textproto: introduce Header type (thanks Petar Maymounkov).
+* websocket: use new interface to access Header.
+</pre>
+
+<h2 id="2011-02-15">2011-02-15</h2>
+
+<pre>
+This release includes changes to the io, os, and template packages.
+You may need to update your code.
+
+The io.ReadByter and io.ReadRuner interface types have been renamed to
+io.ByteReader and io.RuneReader respectively.
+
+The os package's ForkExec function has been superseded by the new StartProcess
+function and an API built around the Process type:
+ http://golang.org/pkg/os/#Process
+
+The order of arguments to template.Execute has been reversed to be consistent
+the notion of "destination first", as with io.Copy, fmt.Fprint, and others.
+
+Gotest now works for package main in directories using Make.cmd-based makefiles.
+
+The memory allocation runtime problems from the last release are not completely
+fixed. The virtual memory exhaustion problems encountered by people using
+ulimit -v have been fixed, but there remain known garbage collector problems
+when using GOMAXPROCS > 1.
+
+Other changes:
+* 5l: stopped generating 64-bit eor.
+* 8l: more work on plan9 support (thanks Yuval Pavel Zholkover).
+* archive/zip: handle files with data descriptors.
+* arm: working peep-hole optimizer.
+* asn1: marshal true as 255, not 1.
+* buffer.go: minor optimization, expanded comment.
+* build: drop syslog on DISABLE_NET_TESTS=1 (thanks Gustavo Niemeyer),
+ allow clean.bash to work on fresh checkout,
+ change "all tests pass" message to be more obvious,
+ fix spaces in GOROOT (thanks Christopher Nielsen).
+* bytes: fix bug in buffer.ReadBytes (thanks Evan Shaw).
+* 5g: better int64 code,
+ don't use MVN instruction.
+* cgo: don't run cgo when not compiling (thanks Gustavo Niemeyer),
+ fix _cgo_run timestamp file order (thanks Gustavo Niemeyer),
+ fix handling of signed enumerations (thanks Gustavo Niemeyer),
+ os/arch dependent #cgo directives (thanks Gustavo Niemeyer),
+ rename internal f to avoid conflict with possible C global named f.
+* codereview: fix hgpatch on windows (thanks Yasuhiro Matsumoto),
+ record repository, base revision,
+ use cmd.communicate (thanks Yasuhiro Matsumoto).
+* container/ring: replace Iter() with Do().
+* crypto/cipher: add resync open to OCFB mode.
+* crypto/openpgp/armor: bug fixes.
+* crypto/openpgp/packet: new subpackage.
+* crypto/tls: load a chain of certificates from a file,
+ select best cipher suite, not worst.
+* crypto/x509: add support for name constraints.
+* debug/pe: ImportedSymbols fixes (thanks Wei Guangjing).
+* doc/code: update to reflect that package names need not be unique.
+* doc/codelab/wiki: a bunch of fixes (thanks Andrey Mirtchovski).
+* doc/install: update for new versions of Mercurial.
+* encoding/line: fix line returned after EOF.
+* flag: allow hexadecimal (0xFF) and octal (0377) input for integer flags.
+* fmt.Scan: scan binary-exponent floating format, 2.4p-3,
+ hexadecimal (0xFF) and octal (0377) integers.
+* fmt: document %%; also %b for floating point.
+* gc, ld: detect stale or incompatible object files,
+ package name main no longer reserved.
+* gc: correct receiver in method missing error (thanks Lorenzo Stoakes),
+ correct rounding of denormal constants (thanks Eoghan Sherry),
+ select receive bug fix.
+* go/printer, gofmt: smarter handling of multi-line raw strings.
+* go/printer: line comments must always end in a newline,
+ remove notion of "Styler", remove HTML mode.
+* gob: allow Decode(nil) and have it just discard the next value.
+* godoc: use IsAbs to test for absolute paths (fix for win32) (thanks Yasuhiro Matsumoto),
+ don't hide package lookup error if there's no command with the same name.
+* gotest: enable unit tests for main programs.
+* http: add Server type supporting timeouts,
+ add pipelining to ClientConn, ServerConn (thanks Petar Maymounkov),
+ handle unchunked, un-lengthed HTTP/1.1 responses.
+* io: add RuneReader.
+* json: correct Marshal documentation.
+* netchan: graceful handling of closed connection (thanks Graham Miller).
+* os: implement new Process API (thanks Alex Brainman).
+* regexp tests: make some benchmarks more meaningful.
+* regexp: add support for matching against text read from RuneReader interface.
+* rpc: make more tolerant of errors, properly discard values (thanks Roger Peppe).
+* runtime: detect failed thread creation on Windows,
+ faster allocator, garbage collector,
+ fix virtual memory exhaustion,
+ implemented windows console ctrl handler (SIGINT) (thanks Hector Chu),
+ more detailed panic traces, line number work,
+ improved Windows callback handling (thanks Hector Chu).
+* spec: adjust notion of Assignability,
+ allow import of packages named main,
+ clarification re: method sets of newly declared pointer types,
+ fix a few typos (thanks Anthony Martin),
+ fix Typeof() return type (thanks Gustavo Niemeyer),
+ move to Unicode 6.0.
+* sync: diagnose Unlock of unlocked Mutex,
+ new Waitgroup type (thanks Gustavo Niemeyer).
+* syscall: add SetsockoptIpMreq (thanks Dave Cheney),
+ add sockaddr_dl, sysctl with routing message support for darwin, freebsd (thanks Mikio Hara),
+ do not use NULL for zero-length read, write,
+ implement windows version of Fsync (thanks Alex Brainman),
+ make ForkExec acquire the ForkLock under windows (thanks Hector Chu),
+ make windows API return errno instead of bool (thanks Alex Brainman),
+ remove obsolete socket IO control (thanks Mikio Hara).
+* template: add simple formatter chaining (thanks Kyle Consalus),
+ allow a leading '*' to indirect through a pointer.
+* testing: include elapsed time in test output
+* windows: replace remaining __MINGW32__ instances with _WIN32 (thanks Joe Poirier).
+</pre>
+
+<h2 id="2011-02-01">2011-02-01</h2>
+
+<pre>
+This release includes significant changes to channel operations and minor
+changes to the log package. Your code will require modification if it uses
+channels in non-blocking communications or the log package's Exit functions.
+
+Non-blocking channel operations have been removed from the language.
+The equivalent operations have always been possible using a select statement
+with a default clause. If a default clause is present in a select, that clause
+will execute (only) if no other is ready, which allows one to avoid blocking on
+a communication.
+
+For example, the old non-blocking send operation,
+
+ if ch <- v {
+ // sent
+ } else {
+ // not sent
+ }
+
+should be rewritten as,
+
+ select {
+ case ch <- v:
+ // sent
+ default:
+ // not sent
+ }
+
+Similarly, this receive,
+
+ v, ok := <-ch
+ if ok {
+ // received
+ } else {
+ // not received
+ }
+
+should be rewritten as,
+
+ select {
+ case v := <-ch:
+ // received
+ default:
+ // not received
+ }
+
+This change is a prelude to redefining the 'comma-ok' syntax for a receive.
+In a later release, a receive expression will return the received value and an
+optional boolean indicating whether the channel has been closed. These changes
+are being made in two stages to prevent this semantic change from silently
+breaking code that uses 'comma-ok' with receives.
+There are no plans to have a boolean expression form for sends.
+
+Sends to a closed channel will panic immediately. Previously, an unspecified
+number of sends would fail silently before causing a panic.
+
+The log package's Exit, Exitf, and Exitln functions have been renamed Fatal,
+Fatalf, and Fatalln respectively. This brings them in line with the naming of
+the testing package.
+
+The port to the "tiny" operating system has been removed. It is unmaintained
+and untested. It was a toy to show that Go can run on raw hardware and it
+served its purpose. The source code will of course remain in the repository
+history, so it could be brought back if needed later.
+
+This release also changes some of the internal structure of the memory
+allocator in preparation for other garbage collector changes.
+If you run into problems, please let us know.
+There is one known issue that we are aware of but have not debugged yet:
+ http://code.google.com/p/go/issues/detail?id=1464&.
+
+Other changes in this release:
+* 5l: document -F, force it on old ARMs (software floating point emulation)
+* 6g: fix registerization of temporaries (thanks Eoghan Sherry),
+ fix uint64(uintptr(unsafe.Pointer(&x))).
+* 6l: Relocate CMOV* instructions (thanks Gustavo Niemeyer),
+ windows/amd64 port (thanks Wei Guangjing).
+* 8l: add PE dynexport, emit DWARF in Windows PE, and
+ code generation fixes (thanks Wei Guangjing).
+* bufio: make Flush a no-op when the buffer is empty.
+* bytes: Add Buffer.ReadBytes, Buffer.ReadString (thanks Evan Shaw).
+* cc: mode to generate go-code for types and variables.
+* cgo: define CGO_CFLAGS and CGO_LDFLAGS in Go files (thanks Gustavo Niemeyer),
+ windows/386 port (thanks Wei Guangjing).
+* codereview: fix windows (thanks Hector Chu),
+ handle file patterns better,
+ more ASCII vs. Unicode nonsense.
+* crypto/dsa: add support for DSA.
+* crypto/openpgp: add s2k.
+* crypto/rand: use defer to unlock mutex (thanks Anschel Schaffer-Cohen).
+* crypto/rsa: correct docstring for SignPKCS1v15.
+* crypto: add package, a common place to store identifiers for hash functions.
+* doc/codelab/wiki: update to work with template changes, add to run.bash.
+* doc/spec: clarify address operators.
+* ebnflint: exit with non-zero status on error.
+* encoding/base32: new package (thanks Miek Gieben).
+* encoding/line: make it an io.Reader too.
+* exec: use custom error for LookPath (thanks Gustavo Niemeyer).
+* fmt/doc: define width and precision for strings.
+* gc: clearer error for struct == struct,
+ fix send precedence,
+ handle invalid name in type switch,
+ special case code for single-op blocking and non-blocking selects.
+* go/scanner: fix build (adjust scanner EOF linecount).
+* gob: better debugging, commentary,
+ make nested interfaces work,
+ report an error when encoding a non-empty struct with no public fields.
+* godoc: full text index for whitelisted non-Go files,
+ show line numbers for non-go files (bug fix).
+* gofmt -r: match(...) arguments may be nil; add missing guards.
+* govet: add Panic to the list of functions.
+* http: add host patterns (thanks Jose Luis Vázquez González),
+ follow relative redirect in Get.
+* json: handle capital floating point exponent (1E100) (thanks Pieter Droogendijk).
+* ld: add -I option to set ELF interpreter,
+ more robust decoding of reflection type info in generating dwarf.
+* lib9: update to Unicode 6.0.0.
+* make.bash: stricter selinux test (don't complain unless it is enabled).
+* misc/vim: Import/Drop commands (thanks Gustavo Niemeyer),
+ set 'syntax sync' to a large value (thanks Yasuhiro Matsumoto).
+* net: fix race condition in test,
+ return cname in LookupHost.
+* netchan: avoid race condition in test,
+ fixed documentation for import (thanks Anschel Schaffer-Cohen).
+* os: add ETIMEDOUT (thanks Albert Strasheim).
+* runtime: generate Go defs for C types,
+ implementation of callback functions for windows (thanks Alex Brainman),
+ make Walk web browser example work (thanks Hector Chu),
+ make select fairer,
+ prefer fixed stack allocator over general memory allocator,
+ simpler heap map, memory allocation.
+* scanner: fix Position returned by Scan, Pos,
+ don't read ahead in Init.
+* suffixarray: use binary search for both ends of Lookup (thanks Eric Eisner).
+* syscall: add missing network interface constants (thanks Mikio Hara).
+* template: treat map keys as zero, not non-existent (thanks Roger Peppe).
+* time: allow cancelling of After events (thanks Roger Peppe),
+ support Solaris zoneinfo directory.
+* token/position: added SetLinesForContent.
+* unicode: update to unicode 6.0.0.
+* unsafe: add missing case to doc for Pointer.
+</pre>
+
+<h2 id="2011-01-20">2011-01-20</h2>
+
+<pre>
+This release removes the float and complex types from the language.
+
+The default type for a floating point literal is now float64, and
+the default type for a complex literal is now complex128.
+
+Existing code that uses float or complex must be rewritten to
+use explicitly sized types.
+
+The two-argument constructor cmplx is now spelled complex.
+</pre>
+
+<h2 id="2011-01-19">2011-01-19</h2>
+
+<pre>
+The 5g (ARM) compiler now has registerization enabled. If you discover it
+causes bugs, use 5g -N to disable the registerizer and please let us know.
+
+The xml package now allows the extraction of nested XML tags by specifying
+struct tags of the form "parent>child". See the XML documentation for an
+example: http://golang.org/pkg/xml/
+
+* 5a, 5l, 6a, 6l, 8a, 8l: handle out of memory, large allocations (thanks Jeff R. Allen).
+* 8l: pe changes (thanks Alex Brainman).
+* arm: fixes and improvements.
+* cc: fix vlong condition.
+* cgo: add complex float, complex double (thanks Sebastien Binet),
+ in _cgo_main.c define all provided symbols as functions.
+* codereview: don't mail change lists with no files (thanks Ryan Hitchman).
+* crypto/cipher: add OFB mode.
+* expvar: add Float.
+* fmt: document %X of string, []byte.
+* gc, runtime: make range on channel safe for multiple goroutines.
+* gc: fix typed constant declarations (thanks Anthony Martin).
+* go spec: adjust language for constant typing.
+* go/scanner: Make Init take a *token.File instead of a *token.FileSet.
+* godoc: bring back "indexing in progress" message,
+ don't double HTML-escape search result snippets,
+ enable qualified identifiers ("math.Sin") as query strings again,
+ peephole optimization for generated HTML,
+ remove tab before formatted section.
+* gofmt, go/printer: do not insert extra line breaks where they may break the code.
+* http: fix Content-Range and Content-Length in response (thanks Clement Skau),
+ fix scheme-relative URL parsing; add ParseRequestURL,
+ handle HEAD requests correctly,
+ support for relative URLs.
+* math: handle denormalized numbers in Frexp, Ilogb, Ldexp, and Logb (thanks Eoghan Sherry).
+* net, syscall: return source address in Recvmsg (thanks Albert Strasheim).
+* net: add LookupAddr (thanks Kyle Lemons),
+ add unixpacket (thanks Albert Strasheim),
+ avoid nil dereference if /etc/services can't be opened (thanks Corey Thomasson),
+ implement windows timeout (thanks Wei Guangjing).
+* netchan: do not block sends; implement flow control (thanks Roger Peppe).
+* regexp: reject bare '?'. (thanks Ben Lynn)
+* runtime/cgo: don't define crosscall2 in dummy _cgo_main.c.
+* runtime/debug: new package for printing stack traces from a running goroutine.
+* runtime: add per-pause gc stats,
+ fix arm reflect.call boundary case,
+ print signal information during panic.
+* spec: specify that int and uint have the same size.
+* syscall: correct WSTOPPED on OS X,
+ correct length of GNU/Linux abstract Unix domain sockaddr,
+ correct length of SockaddrUnix.
+* tutorial: make stdin, stdout, stderr work on Windows.
+* windows: implement exception handling (thanks Hector Chu).
+</pre>
+
+<h2 id="2011-01-12">2011-01-12</h2>
+
+<pre>
+The json, gob, and template packages have changed, and code that uses them
+may need to be updated after this release. They will no longer read or write
+unexported struct fields. When marshalling a struct with json or gob the
+unexported fields will be silently ignored. Attempting to unmarshal json or
+gob data into an unexported field will generate an error. Accessing an
+unexported field from a template will cause the Execute function to return
+an error.
+
+Godoc now supports regular expression full text search, and this
+functionality is now available on golang.org.
+
+Other changes:
+* arm: initial cut at arm optimizer.
+* bytes.Buffer: Fix bug in UnreadByte.
+* cgo: export unsafe.Pointer as void*, fix enum const conflict,
+ output alignment fix (thanks Gustavo Niemeyer).
+* crypto/block: mark as deprecated.
+* crypto/openpgp: add error and armor.
+* crypto: add twofish package (thanks Berengar Lehr).
+* doc/spec: remove Maxalign from spec.
+* encoding/line: new package for reading lines from an io.Reader.
+* go/ast: correct end position for Index and TypeAssert expressions.
+* gob: make (en|dec)code(Ui|I)nt methods rather than functions.
+* godefs: better handling of enums.
+* gofmt: don't attempt certain illegal rewrites,
+ rewriter matches apply to expressions only.
+* goinstall: preliminary support for cgo packages (thanks Gustavo Niemeyer).
+* hg: add cgo/_cgo_* to .hgignore.
+* http: fix text displayed in Redirect.
+* ld: fix exported dynamic symbols on Mach-O,
+ permit a Mach-O symbol to be exported in the dynamic symbol table.
+* log: add methods for exit and panic.
+* net: use closesocket api instead of CloseHandle on Windows (thanks Alex Brainman).
+* netchan: make fields exported for gob change.
+* os: add Sync to *File, wraps syscall.Fsync.
+* runtime/cgo: Add callbacks to support SWIG.
+* runtime: Restore scheduler stack position if cgo callback panics.
+* suffixarray: faster creation algorithm (thanks Eric Eisner).
+* syscall: fix mksysnum_linux.sh (thanks Anthony Martin).
+* time.NewTicker: panic for intervals <= 0.
+* time: add AfterFunc to call a function after a duration (thanks Roger Peppe),
+ fix tick accuracy when using multiple Tickers (thanks Eoghan Sherry).</pre>
+
+<h2 id="2011-01-06">2011-01-06</h2>
+
+<pre>
+This release includes several fixes and changes:
+
+* build: Make.pkg: use installed runtime.h for cgo.
+* cgo: disallow use of C.errno.
+* crypto/cipher: fix OCFB,
+ make NewCBCEncrypter return BlockMode.
+* doc: 6l: fix documentation of -L flag,
+ add golanguage.ru to foreign-language doc list,
+ effective go: explain the effect of repanicking better,
+ update Effective Go for template API change,
+ update contribution guidelines to prefix the change description.
+* encoding/binary: reject types with implementation-dependent sizes (thanks Patrick Gavlin).
+* exp/evalsimple fix handling of slices like s[:2] (thanks Sebastien Binet).
+* fmt: made format string handling more efficient,
+ normalize processing of format string.
+* gc: return constant floats for parts of complex constants (thanks Anthony Martin),
+ rewrite complex /= to l = l / r (thanks Patrick Gavlin),
+ fix &^=.
+* go/ast: provide complete node text range info.
+* gob: generate a better error message in one confusing place.
+* godoc: fix godoc -src (thanks Icarus Sparry).
+* goinstall: add -clean flag (thanks Kyle Lemons),
+ add checkout concept (thanks Caine Tighe),
+ fix -u for bzr (thanks Gustavo Niemeyer).
+* http: permit empty Reason-Phrase in response Status-Line.
+* io: fix Copyn EOF handling.
+* net: fix close of Listener (thanks Michael Hoisie).
+* regexp: fix performance bug, make anchored searches fail fast,
+ fix prefix bug.
+* runtime/cgo: fix stackguard on FreeBSD/amd64 (thanks Anthony Martin).
+* strconv: atof: added 'E' as valid token for exponent (thanks Stefan Nilsson),
+ update ftoa comment for 'E' and 'G'.
+* strings: fix description of FieldsFunc (thanks Roger Peppe).
+* syscall: correct Linux Splice definition,
+ make Access second argument consistently uint32.
+</pre>
+
+<h2 id="2010-12-22">2010-12-22</h2>
+
+<pre>
+A small release this week. The most significant change is that some
+outstanding cgo issues were resolved.
+
+* cgo: handle references to symbols in shared libraries.
+* crypto/elliptic: add serialisation and key pair generation.
+* crypto/hmac: add HMAC-SHA256 (thanks Anthony Martin).
+* crypto/tls: add ECDHE support ("Elliptic Curve Diffie Hellman Ephemeral"),
+ add support code for generating handshake scripts for testing.
+* darwin, freebsd: ignore write failure (during print, panic).
+* exp/draw: remove Border function.
+* expvar: quote StringFunc output, same as String output.
+* hash/crc64: fix typo in Sum.
+* ld: allow relocations pointing at ELF .bss symbols, ignore stab symbols.
+* misc/cgo/life: fix, add to build.
+* regexp: add HasMeta, HasOperator, and String methods to Regexp.
+* suffixarray: implemented FindAllIndex regexp search.
+* test/bench: update numbers for regex-dna after speedup to regexp.
+* time: explain the formats a little better.
+</pre>
+
+<h2 id="2010-12-15">2010-12-15</h2>
+
+<pre>
+Package crypto/cipher has been started, to replace crypto/block.
+As part of the changes, rc4.Cipher's XORKeyStream method signature has changed from
+ XORKeyStream(buf []byte)
+to
+ XORKeyStream(dst, src []byte)
+to implement the cipher.Stream interface. If you use crypto/block, you'll need
+to switch to crypto/cipher once it is complete.
+
+Package smtp's StartTLS now takes a *tls.Config argument.
+
+Package reflect's ArrayCopy has been renamed to Copy. There are new functions
+Append and AppendSlice.
+
+The print/println bootstrapping functions now write to standard error.
+To write to standard output, use fmt.Print[ln].
+
+A new tool, govet, has been added to the Go distribution. Govet is a static
+checker for Go programs. At the moment, and for the forseeable future,
+it only checks arguments to print calls.
+
+The cgo tool for writing Go bindings for C code has changed so that it no
+longer uses stub .so files (like cgo_stdio.so). Cgo-based packages using the
+standard Makefiles should build without any changes. Any alternate build
+mechanisms will need to be updated.
+
+The C and Go compilers (6g, 6c, 8g, 8c, 5g, 5c) now align structs according to
+the maximum alignment of the fields they contain; previously they aligned
+structs to word boundaries. This may break non-cgo-based code that attempts to
+mix C and Go.
+
+NaCl support has been removed. The recent linker changes broke NaCl support
+a month ago, and there are no known users of it.
+If necessary, the NaCl code can be recovered from the repository history.
+
+* 5g/8g, 8l, ld, prof: fix output of 32-bit values (thanks Eoghan Sherry).
+* [68]l and runtime: GDB support for interfaces and goroutines.
+* 6l, 8l: support for linking ELF and Mach-O .o files.
+* all: simplify two-variable ranges with unused second variable (thanks Ryan Hitchman).
+* arm: updated soft float support.
+* codereview: keep quiet when not in use (thanks Eoghan Sherry).
+* compress/flate: implement Flush, equivalent to zlib's Z_SYNC_FLUSH.
+* crypto/tls: use rand.Reader in cert generation example (thanks Anthony Martin).
+* dashboard: fix project tag filter.
+* debug/elf, debug/macho: add ImportedLibraries, ImportedSymbols.
+* doc/go_mem: goroutine exit is not special.
+* event.go: another print glitch from gocheck.
+* gc: bug fixes,
+ syntax error for incomplete chan type (thanks Ryan Hitchman).
+* go/ast: fix ast.Walk.
+* gob: document the byte count used in the encoding of values,
+ fix bug sending zero-length top-level slices and maps,
+ Register should use the original type, not the indirected one.
+* godashboard: support submitting projects with non-ascii names (thanks Ryan Hitchman)
+* godefs: guard against structs with pad fields
+* godoc: added textual search, to enable use -fulltext flag.
+* gofmt: simplify "x, _ = range y" to "x = range y".
+* gopack: allow ELF/Mach-O objects in .a files without clearing allobj.
+* go/token,scanner: fix comments so godoc aligns properly.
+* govet: on error continue to the next file (thanks Christopher Wedgwood).
+* html: improved parsing.
+* http: ServeFile handles Range header for partial requests.
+* json: check for invalid UTF-8.
+* ld: allow .o files with no symbols,
+ reading of ELF object files,
+ reading of Mach-O object files.
+* math: change float64 bias constant from 1022 to 1023 (thanks Eoghan Sherry),
+ rename the MinFloat constant to SmallestNonzeroFloat.
+* nm: silently ignore .o files in .a files.
+* os: fix test of RemoveAll.
+* os/inotify: new package (thanks Balazs Lecz).
+* os: make MkdirAll work with symlinks (thanks Ryan Hitchman).
+* regexp: speed up by about 30%; also simplify code for brackets.
+* runtime/linux/386: set FPU to 64-bit precision.
+* runtime: remove paranoid mapping at 0.
+* suffixarray: add Bytes function.
+* syscall: add network interface constants for linux/386, linux/amd64 (thanks Mikio Hara).
+* syscall/windows: restrict access rights param of OpenProcess(),
+ remove \r and \n from error messages (thanks Alex Brainman).
+* test/bench: fixes to timing.sh (thanks Anthony Martin).
+* time: fix bug in Ticker: shutdown using channel rather than memory.
+* token/position: provide FileSet.File, provide files iterator.
+* xml: disallow invalid Unicode code points (thanks Nigel Kerr).
+</pre>
+
+<h2 id="2010-12-08">2010-12-08</h2>
+
+<pre>
+This release includes some package changes. If you use the crypto/tls or
+go/parser packages your code may require changes.
+
+The crypto/tls package's Dial function now takes an additional *Config
+argument. Most uses will pass nil to get the same default behavior as before.
+See the documentation for details:
+ http://golang.org/pkg/crypto/tls/#Config
+ http://golang.org/pkg/crypto/tls/#Dial
+
+The go/parser package's ParseFile function now takes a *token.FileSet as its
+first argument. This is a pointer to a data structure used to store
+position information. If you don't care about position information you
+can pass "token.NewFileSet()". See the documentation for details:
+ http://golang.org/pkg/go/parser/#ParseFile
+
+This release also splits the patent grant text out of the LICENSE file into a
+separate PATENTS file and changes it to be more like the WebM grant.
+These clarifications were made at the request of the Fedora project.
+
+Other changes:
+* [68]l: generate debug info for builtin structured types, prettyprinting in gdb.
+* 8l: add dynimport to import table in Windows PE (thanks Wei Guangjing).
+* 8l, runtime: fix Plan 9 386 build (thanks Yuval Pavel Zholkover).
+* all: fix broken calls to Printf etc.
+* bufio: make Reader.Read implement io.Reader semantics (thanks Roger Peppe).
+* build: allow archiver to be specified by HOST_AR (thanks Albert Strasheim).
+* bytes: add Buffer.UnreadRune, Buffer.UnreadByte (thanks Roger Peppe).
+* crypto/tls: fix build of certificate generation example (thanks Christian Himpel).
+* doc/install: describe GOHOSTOS and GOHOSTARCH.
+* errchk: accept multiple source files (thanks Eoghan Sherry).
+* exec.LookPath: return os.PathError instad of os.ENOENT (thanks Michael Hoisie)..
+* flag: fix format error in boolean error report,
+ handle multiple calls to flag.Parse.
+* fmt: add %U format for standard Unicode representation of code point values.
+* gc: fix method offsets of anonymous interfaces (thanks Eoghan Sherry),
+ skip undefined symbols in import . (thanks Eoghan Sherry).
+* go/scanner: remove Tokenize - was only used in tests
+* gobuilder: add buildroot command-line flag (thanks Devon H. O'Dell).
+* html: unescape numeric entities (thanks Ryan Hitchman).
+* http: Add EncodeQuery, helper for constructing query strings.
+* ld: fix dwarf decoding of 64-bit reflect values (thanks Eoghan Sherry).
+* math: improve accuracy of Exp2 (thanks Eoghan Sherry).
+* runtime: add Goroutines (thanks Keith Rarick).
+* sync: small naming fix for armv5 (thanks Dean Prichard).
+* syscall, net: Add Recvmsg and Sendmsg on Linux (thanks Albert Strasheim).
+* time: make After use fewer goroutines and host processes (thanks Roger Peppe).
+</pre>
+
+<h2 id="2010-12-02">2010-12-02</h2>
+
+<pre>
+Several package changes in this release may require you to update your code if
+you use the bytes, template, or utf8 packages. In all cases, any outdated code
+will fail to compile rather than behave erroneously.
+
+The bytes package has changed. Its Add and AddByte functions have been removed,
+as their functionality is provided by the recently-introduced built-in function
+"append". Any code that uses them will need to be changed:
+s = bytes.Add(s, b) -> s = append(s, b...)
+s = bytes.AddByte(b, c) -> s = append(s, b)
+s = bytes.Add(nil, c) -> append([]byte(nil), c)
+
+The template package has changed. Your code will need to be updated if it calls
+the HTMLFormatter or StringFormatter functions, or implements its own formatter
+functions. The function signature for formatter types has changed to:
+ func(wr io.Writer, formatter string, data ...interface{})
+to allow multiple arguments to the formatter. No templates will need updating.
+See the change for examples:
+ http://code.google.com/p/go/source/detail?r=2c2be793120e
+
+The template change permits the implementation of multi-word variable
+instantiation for formatters. Before one could say
+ {field}
+or
+ {field|formatter}
+Now one can also say
+ {field1 field2 field3}
+or
+ {field1 field2 field3|formatter}
+and the fields are passed as successive arguments to the formatter,
+by analogy to fmt.Print.
+
+The utf8 package has changed. The order of EncodeRune's arguments has been
+reversed to satisfy the convention of "destination first".
+Any code that uses EncodeRune will need to be updated.
+
+Other changes:
+* [68]l: correct dwarf location for globals and ranges for arrays.
+* big: fix (*Rat) SetFrac64(a, b) when b < 0 (thanks Eoghan Sherry).
+* compress/flate: fix typo in comment (thanks Mathieu Lonjaret).
+* crypto/elliptic: use a Jacobian transform for better performance.
+* doc/code.html: fix reference to "gomake build" (thanks Anschel Schaffer-Cohen).
+* doc/roadmap: update gdb status.
+* doc/spec: fixed some omissions and type errors.
+* doc: some typo fixes (thanks Peter Mundy).
+* exp/eval: build fix for parser.ParseFile API change (thanks Anschel Schaffer-Cohen).
+* fmt: Scan accepts Inf and NaN,
+ allow "% X" as well as "% x".
+* go/printer: preserve newlines in func parameter lists (thanks Jamie Gennis).
+* http: consume request body before next request.
+* log: ensure writes are atomic (thanks Roger Peppe).
+* path: Windows support for Split (thanks Benny Siegert).
+* runtime: fix SysFree to really free memory on Windows (thanks Alex Brainman),
+ parallel definitions in Go for all C structs.
+* sort: avoid overflow in pivot calculation,
+ reduced stack depth to lg(n) in quickSort (thanks Stefan Nilsson).
+* strconv: Atof on Infs and NaNs.
+</pre>
+
+<h2 id="2010-11-23">2010-11-23</h2>
+
+<pre>
+This release includes a backwards-incompatible package change to the
+sort.Search function (introduced in the last release).
+See the change for details and examples of how you might change your code:
+ http://code.google.com/p/go/source/detail?r=102866c369
+
+* build: automatically #define _64BIT in 6c.
+* cgo: print required space after parameter name in wrapper function.
+* crypto/cipher: new package to replace crypto/block (thanks Adam Langley).
+* crypto/elliptic: new package, implements elliptic curves over prime fields (thanks Adam Langley).
+* crypto/x509: policy OID support and fixes (thanks Adam Langley).
+* doc: add link to codewalks,
+ fix recover() documentation (thanks Anschel Schaffer-Cohen),
+ explain how to write Makefiles for commands.
+* exec: enable more tests on windows (thanks Alex Brainman).
+* gc: adjustable hash code in typecheck of composite literals
+ (thanks to vskrap, Andrey Mirtchovski, and Eoghan Sherry).
+* gc: better error message for bad type in channel send (thanks Anthony Martin).
+* godoc: bug fix in relativePath,
+ compute search index for all file systems under godoc's observation,
+ use correct time stamp to indicate accuracy of search result.
+* index/suffixarray: use sort.Search.
+* net: add ReadFrom and WriteTo windows version (thanks Wei Guangjing).
+* reflect: remove unnecessary casts in Get methods.
+* rpc: add RegisterName to allow override of default type name.
+* runtime: free memory allocated by windows CommandLineToArgv (thanks Alex Brainman).
+* sort: simplify Search (thanks Roger Peppe).
+* strings: add LastIndexAny (thanks Benny Siegert).
+</pre>
+
+<h2 id="2010-11-10">2010-11-10</h2>
+
+<pre>
+The birthday release includes a new Search capability inside the sort package.
+It takes an unusual but very general and easy-to-use approach to searching
+arbitrary indexable sorted data. See the documentation for details:
+ http://golang.org/pkg/sort/#Search
+
+The ARM port now uses the hardware floating point unit (VFP). It still has a
+few bugs, mostly around conversions between unsigned integer and floating-point
+values, but it's stabilizing.
+
+In addition, there have been many smaller fixes and updates:
+
+* 6l: generate dwarf variable names with disambiguating suffix.
+* container/list: make Remove return Value of removed element.
+ makes it easier to remove first or last item.
+* crypto: add cast5 (default PGP cipher),
+ switch block cipher methods to be destination first.
+* crypto/tls: use pool building for certificate checking
+* go/ast: change embedded token.Position fields to named fields
+ (preparation for a different position representation)
+* net: provide public access to file descriptors (thanks Keith Rarick)
+* os: add Expand function to evaluate environment variables.
+* path: add Glob (thanks Benny Siegert)
+* runtime: memequal optimization (thanks Graham Miller)
+ prefix all external symbols with "runtime·" to avoid
+ conflicts linking with external C libraries.
+</pre>
+
+<h2 id="2010-11-02">2010-11-02</h2>
+
+<pre>
+This release includes a language change: the new built-in function, append.
+Append makes growing slices much simpler. See the spec for details:
+ http://golang.org/doc/go_spec.html#Appending_and_copying_slices
+
+Other changes:
+* 8l: pe generation fixes (thanks Alex Brainman).
+* doc: Effective Go: append and a few words about "..." args.
+* build: fiddle with make variables.
+* codereview: fix sync and download in Python 2.7 (thanks Fazlul Shahriar).
+* debug/pe, cgo: add windows support (thanks Wei Guangjing).
+* go/ast: add Inspect function for easy AST inspection w/o a visitor.
+* go/printer: do not remove parens around composite literals starting with
+ a type name in control clauses.
+* go/scanner: bug fixes, revisions, and more tests.
+* gob: several fixes and documentation updates.
+* godoc: bug fix (bug introduced with revision 3ee58453e961).
+* gotest: print empty benchmark list in a way that gofmt will leave alone.
+* http server: correctly respond with 304 NotModified (thanks Michael Hoisie).
+* kate: update list of builtins (thanks Evan Shaw).
+* libutf: update to Unicode 5.2.0 to match pkg/unicode (thanks Anthony Martin).
+* misc/bbedit: update list of builtins (thanks Anthony Starks).
+* misc/vim: update list of builtins.
+* mkrunetype: install a Makefile and tweak it slightly so it can be built.
+* netchan: fix locking bug.
+* pidigits: minor improvements (thanks Evan Shaw).
+* rpc: fix client deadlock bug.
+* src: use append where appropriate (often instead of vector).
+* strings: add Contains helper function (thanks Brad Fitzpatrick).
+* syscall: SIO constants for Linux (thanks Albert Strasheim),
+ Stat(path) on windows (thanks Alex Brainman).
+* test/ken/convert.go: add conversion torture test.
+* testing: add Benchmark (thanks Roger Peppe).
+</pre>
+
+<h2 id="2010-10-27">2010-10-27</h2>
+
+<pre>
+*** This release changes the encoding used by package gob.
+ If you store gobs on disk, see below. ***
+
+The ARM port (5g) now passes all tests. The optimizer is not yet enabled, and
+floating point arithmetic is performed entirely in software. Work is underway
+to address both of these deficiencies.
+
+The syntax for arrays, slices, and maps of composite literals has been
+simplified. Within a composite literal of array, slice, or map type, elements
+that are themselves composite literals may elide the type if it is identical to
+the outer literal's element type. For example, these expressions:
+ [][]int{[]int{1, 2, 3}, []int{4, 5}}
+ map[string]Point{"x": Point{1.5, -3.5}, "y": Point{0, 0}}
+can be simplified to:
+ [][]int{{1, 2, 3}, {4, 5}}
+ map[string]Point{"x": {1.5, -3.5}, "y": {0, 0}}
+Gofmt can make these simplifications mechanically when invoked with the
+new -s flag.
+
+The built-in copy function can now copy bytes from a string value to a []byte.
+Code like this (for []byte b and string s):
+ for i := 0; i < len(s); i++ {
+ b[i] = s[i]
+ }
+can be rewritten as:
+ copy(b, s)
+
+The gob package can now encode and decode interface values containing types
+registered ahead of time with the new Register function. These changes required
+a backwards-incompatible change to the wire format. Data written with the old
+version of the package will not be readable with the new one, and vice versa.
+(Steps were made in this change to make sure this doesn't happen again.)
+We don't know of anyone using gobs to create permanent data, but if you do this
+and need help converting, please let us know, and do not update to this release
+yet. We will help you convert your data.
+
+Other changes:
+* 5g, 6g, 8g: generate code for string index instead of calling function.
+* 5l, 6l, 8l: introduce sub-symbols.
+* 6l/8l: global and local variables and type info.
+* Make.inc: delete unnecessary -fno-inline flag to quietgcc.
+* arm: precise float64 software floating point, bug fixes.
+* big: arm assembly, faster software mulWW, divWW.
+* build: only print "You need to add foo to PATH" when needed.
+* container/list: fix Remove bug and use pointer to self as identifier.
+* doc: show page title in browser title bar,
+ update roadmap.
+* encoding/binary: give LittleEndian, BigEndian specific types.
+* go/parser: consume auto-inserted semi when calling ParseExpr().
+* gobuilder: pass GOHOSTOS and GOHOSTARCH to build,
+ write build and benchmarking logs to disk.
+* goinstall: display helpful message when encountering a cgo package,
+ fix test for multiple package names (thanks Fazlul Shahriar).
+* gotest: generate correct gofmt-formatted _testmain.go.
+* image/png: speed up paletted encoding ~25% (thanks Brad Fitzpatrick).
+* misc: update python scripts to specify python2 as python3 is now "python".
+* net: fix comment on Dial to mention unix/unixgram.
+* rpc: expose Server type to allow multiple RPC Server instances.
+* runtime: print unknown types in panic.
+* spec: append built-in (not yet implemented).
+* src: gofmt -s -w src misc.
+ update code to use copy-from-string.
+* test/bench: update numbers.
+* websocket: fix short Read.
+</pre>
+
+<h2 id="2010-10-20">2010-10-20</h2>
+
+<pre>
+This release removes the log package's deprecated functions.
+Code that has not been updated to use the new interface will break.
+See the previous release notes for details:
+ http://golang.org/doc/devel/release.html#2010-10-13
+
+Also included are major improvements to the linker. It is now faster,
+uses less memory, and more parallelizable (but not yet parallel).
+
+The nntp package has been removed from the standard library.
+Its new home is the nntp-go project at Google Code:
+ http://code.google.com/p/nntp-go
+You can install it with goinstall:
+ goinstall nntp-go.googlecode.com/hg/nntp
+And import it in your code like so:
+ import "nntp-go.googlecode.com/hg/nntp"
+
+Other changes:
+* 6g: avoid too-large immediate constants.
+* 8l, runtime: initial support for Plan 9 (thanks Yuval Pavel Zholkover).
+* 6l, 8l: more improvements on exporting debug information (DWARF).
+* arm: code gen fixes. Most tests now pass, except for floating point code.
+* big: add random number generation (thanks Florian Uekermann).
+* gc: keep track of real actual type of identifiers,
+ report that shift must be unsigned integer,
+ select receive with implicit conversion.
+* goplay: fix to run under windows (thanks Yasuhiro Matsumoto).
+* http: do not close connection after sending HTTP/1.0 request.
+* netchan: add new method Hangup to terminate transmission on a channel.
+* os: change TestForkExec so it can run on windows (thanks Yasuhiro Matsumoto).
+* runtime: don't let select split stack.
+* syscall/arm: correct 64-bit system call arguments.
+</pre>
+
+<h2 id="2010-10-13">2010-10-13</h2>
+
+<pre>
+This release includes changes to the log package, the removal of exp/iterable,
+two new tools (gotry and goplay), one small language change, and many other
+changes and fixes. If you use the log or iterable packages, you need to make
+changes to your code.
+
+The log package has changed. Loggers now have only one output, and output to
+standard error by default. The names have also changed, although the old names
+are still supported. They will be deleted in the next release, though, so it
+would be good to update now if you can. For most purposes all you need to do
+is make these substitutions:
+ log.Stderr -> log.Println or log.Print
+ log.Stderrf -> log.Printf
+ log.Crash -> log.Panicln or log.Panic
+ log.Crashf -> log.Panicf
+ log.Exit -> log.Exitln or log.Exit
+ log.Exitf -> log.Exitf (no change)
+Calls to log.New() must drop the second argument.
+Also, custom loggers with exit or panic properties will need to be reworked.
+For full details, see the change description:
+ http://code.google.com/p/go/source/detail?r=d8a3c7563d
+
+The language change is that uses of pointers to interface values no longer
+automatically dereference the pointer. A pointer to an interface value is more
+often a beginner's bug than correct code.
+
+The package exp/iterable has been removed. It was an interesting experiment,
+but it encourages writing inefficient code and has outlived its utility.
+
+The new tools:
+* gotry: an exercise in reflection and an unusual tool. Run 'gotry' for details.
+* goplay: a stand-alone version of the Go Playground. See misc/goplay.
+
+Other changes:
+* 6l: Mach-O fixes, and fix to work with OS X nm/otool (thanks Jim McGrath).
+* [568]a: correct line numbers for statements.
+* arm: code generation and runtime fixes,
+ adjust recover for new reflect.call,
+ enable 6 more tests after net fix.
+* big: fix panic and round correctly in Rat.FloatString (thanks Anthony Martin).
+* build: Make.cmd: remove $(OFILES) (thanks Eric Clark),
+ Make.pkg: remove .so before installing new one,
+ add GOHOSTOS and GOHOSTARCH environment variables.
+* crypto/tls: better error messages for certificate issues,
+ make SetReadTimeout work.
+* doc: add Sydney University video,
+ add The Expressiveness of Go talk.
+* exp/draw/x11: support X11 vendors other than "The X.Org Foundation".
+* expvar: add (*Int).Set (thanks Sam Thorogood).
+* fmt: add Errorf helper function,
+ allow %d on []byte.
+* gc: O(1) string comparison when lengths differ,
+ various bug fixes.
+* http: return the correct error if a header line is too long.
+* image: add image.Tiled type, the Go equivalent of Plan 9's repl bit.
+* ld: be less picky about bad line number info.
+* misc/cgo/life: fix for new slice rules (thanks Graham Miller).
+* net: allow _ in DNS names.
+* netchan: export before import when testing, and
+ zero out request to ensure correct gob decoding. (thanks Roger Peppe).
+* os: make tests work on windows (thanks Alex Brainman).
+* runtime: bug fix: serialize mcache allocation,
+ correct iteration of large map values,
+ faster strequal, memequal (thanks Graham Miller),
+ fix argument dump in traceback,
+ fix tiny build.
+* smtp: new package (thanks Evan Shaw).
+* syscall: add sockaddr_ll support for linux/386, linux/amd64 (thanks Mikio Hara),
+ add ucred structure for SCM_CREDENTIALS over UNIX sockets. (thanks Albert Strasheim).
+* syscall: implement WaitStatus and Wait4() for windows (thanks Wei Guangjing).
+* time: add After.
+* websocket: enable tests on windows (thanks Alex Brainman).
+</pre>
+
+<h2 id="2010-09-29">2010-09-29</h2>
+
+<pre>
+This release includes some minor language changes and some significant package
+changes. You may need to change your code if you use ...T parameters or the
+http package.
+
+The semantics and syntax of forwarding ...T parameters have changed.
+ func message(f string, s ...interface{}) { fmt.Printf(f, s) }
+Here, s has type []interface{} and contains the parameters passed to message.
+Before this language change, the compiler recognized when a function call
+passed a ... parameter to another ... parameter of the same type, and just
+passed it as though it was a list of arguments. But this meant that you
+couldn't control whether to pass the slice as a single argument and you
+couldn't pass a regular slice as a ... parameter, which can be handy. This
+change gives you that control at the cost of a few characters in the call.
+If you want the promotion to ..., append ... to the argument:
+ func message(f string, s ...interface{}) { fmt.Printf(f, s...) }
+Without the ..., s would be passed to Printf as a single argument of type
+[]interface{}. The bad news is you might need to fix up some of your code,
+but the compiler will detect the situation and warn you.
+
+Also, the http.Handler and http.HandlerFunc types have changed. Where http
+handler functions previously accepted an *http.Conn, they now take an interface
+type http.ResponseWriter. ResponseWriter implements the same methods as *Conn,
+so in most cases the only change required will be changing the type signature
+of your handler function's first parameter. See:
+ http://golang.org/pkg/http/#Handler
+
+The utf8 package has a new type, String, that provides efficient indexing
+into utf8 strings by rune (previously an expensive conversion to []int
+was required). See:
+ http://golang.org/pkg/utf8/#String
+
+The compiler will now automatically insert a semicolon at the end of a file if
+one is not found. This effect of this is that Go source files are no longer
+required to have a trailing newline.
+
+Other changes:
+* 6prof: more accurate usage message.
+* archive/zip: new package for reading Zip files.
+* arm: fix code generation, 10 more package tests pass.
+* asn1: make interface consistent with json.
+* bufio.UnreadRune: fix bug at EOF.
+* build: clear custom variables like GREP_OPTIONS,
+ silence warnings generated by ubuntu gcc,
+ use full path when compiling libraries.
+* bytes, strings: change lastIndexFunc to use DecodeLastRune (thanks Roger Peppe).
+* doc: add to and consolidate non-english doc references,
+ consolidate FAQs into a single file, go_faq.html,
+ updates for new http interface.
+* fmt/Printf: document and tweak error messages produced for bad formats.
+* gc: allow select case expr = <-c,
+ eliminate duplicates in method table,
+ fix reflect table method receiver,
+ improve error message for x \= 0.
+* go/scanner: treat EOF like a newline for purposes of semicolon insertion.
+* gofmt: stability improvements.
+* gotest: leave _testmain.go for "make clean" to clean up.
+* http: correct escaping of different parts of URL,
+ support HTTP/1.0 Keep-Alive.
+* json: do not write to unexported fields.
+* libcgo: don't build for NaCl,
+ set g, m in thread local storage for windows 386 (thanks Wei Guangjing).
+* math: Fix off-by-one error in Ilogb and Logb. (thanks Charles L. Dorian).
+* misc/dashboard/builder: remove build files after benchmarking.
+* nacl: update instructions for new SDK.
+* net: enable v4-over-v6 on ip sockets,
+ fix crash in DialIP.
+* os: check for valid arguments in windows Readdir (thanks Peter Mundy).
+* runtime: add mmap of null page just in case,
+ correct stats in SysFree,
+ fix unwindstack crash.
+* syscall: add IPPROTO_IPV6 and IPV6_V6ONLY const to fix nacl and windows build,
+ add inotify on Linux (thanks Balazs Lecz),
+ fix socketpair in syscall_bsd,
+ fix windows value of IPV6_V6ONLY (thanks Alex Brainman),
+ implement windows version of Utimes (thanks Alex Brainman),
+ make mkall.sh work for nacl.
+* test: Add test that causes incorrect error from gccgo.
+* utf8: add DecodeLastRune and DecodeLastRuneInString (thanks Roger Peppe).
+* xml: Allow entities inside CDATA tags (thanks Dan Sinclair).
+</pre>
+
+<h2 id="2010-09-22">2010-09-22</h2>
+
+<pre>
+This release includes new package functionality, and many bug fixes and changes.
+It also improves support for the arm and nacl platforms.
+
+* 5l: avoid fixed buffers in list.
+* 6l, 8l: clean up ELF code, fix NaCl.
+* 6l/8l: emit DWARF frame info.
+* Make.inc: make GOOS detection work on windows (thanks Alex Brainman).
+* build: fixes for native arn build,
+ make all.bash run on Ubuntu ARM.
+* cgo: bug fixes,
+ show preamble gcc errors (thanks Eric Clark).
+* crypto/x509, crypto/tls: improve root matching and observe CA flag.
+* crypto: Fix certificate validation.
+* doc: variable-width layout.
+* env.bash: fix building in directory with spaces in the path (thanks Alex Brainman).
+* exp/4s, exp/nacl/av: sync to recent exp/draw changes.
+* exp/draw/x11: mouse location is a signed integer.
+* exp/nacl/av: update color to max out at 1<<16-1 instead of 1<<32-1.
+* fmt: support '*' for width or precision (thanks Anthony Martin).
+* gc: improvements to static initialization,
+ make sure path names are canonical.
+* gob: make robust when decoding a struct with non-struct data.
+* gobuilder: add -cmd for user-specified build command,
+ add -rev= flag to build specific revision and exit,
+ fix bug that caused old revisions to be rebuilt.
+* godoc: change default filter file name to "",
+ don't use quadratic algorithm to filter paths,
+ show "Last update" info for directory listings.
+* http: new redirect test,
+ URLEscape now escapes all reserved characters as per the RFC.
+* nacl: fix zero-length writes.
+* net/dict: parse response correctly (thanks Fazlul Shahriar).
+* netchan: add a cross-connect test,
+ handle closing of channels,
+ provide a method (Importer.Errors()) to recover protocol errors.
+* os: make Open() O_APPEND flag work on windows (thanks Alex Brainman),
+ make RemoveAll() work on windows (thanks Alex Brainman).
+* pkg/Makefile: disable netchan test to fix windows build (thanks Alex Brainman).
+* regexp: delete Iter methods.
+* runtime: better panic for send to nil channel.
+* strings: fix minor bug in LastIndexFunc (thanks Roger Peppe).
+* suffixarray: a package for creating suffixarray-based indexes.
+* syscall: Use vsyscall for syscall.Gettimeofday and .Time on linux amd64.
+* test: fix NaCl build.
+* windows: fix netchan test by using 127.0.0.1.
+</pre>
+
+<h2 id="2010-09-15">2010-09-15</h2>
+
+<pre>
+This release includes a language change: the lower bound of a subslice may
+now be omitted, in which case the value will default to 0.
+For example, s[0:10] may now be written as s[:10], and s[0:] as s[:].
+
+The release also includes important bug fixes for the ARM architecture,
+as well as the following fixes and changes:
+
+* 5g: register allocation bugs
+* 6c, 8c: show line numbers in -S output
+* 6g, 6l, 8g, 8l: move read-only data to text segment
+* 6l, 8l: make etext accurate; introduce rodata, erodata.
+* arm: fix build bugs.
+ make libcgo build during OS X cross-compile
+ remove reference to deleted file syntax/slice.go
+ use the correct stat syscalls
+ work around reg allocator bug in 5g
+* bufio: add UnreadRune.
+* build: avoid bad environment interactions
+ fix build for tiny
+ generate, clean .exe files on Windows (thanks Joe Poirier)
+ test for _WIN32, not _MINGW32 (thanks Joe Poirier)
+ work with GNU Make 3.82 (thanks Jukka-Pekka Kekkonen)
+* cgo: add typedef for uintptr in generated headers
+ silence warning for C call returning const pointer
+* codereview: convert email address to lower case before checking CONTRIBUTORS
+* crypto/tls: don't return an error from Close()
+* doc/tutorial: update for slice changes.
+* exec: separate LookPath implementations for unix/windows (thanks Joe Poirier)
+* exp/draw/x11: allow clean shutdown when the user closes the window.
+* exp/draw: clip destination rectangle to the image bounds.
+ fast path for drawing overlapping image.RGBAs.
+ fix double-counting of pt.Min for the src and mask points.
+ reintroduce the MouseEvent.Nsec timestamp.
+ rename Context to Window, and add a Close method.
+* exp/debug: preliminary support for 'copy' function (thanks Sebastien Binet)
+* fmt.Fscan: use UnreadRune to preserve data across calls.
+* gc: better printing of named constants, func literals in errors
+ many bug fixes
+ fix line number printing with //line directives
+ fix symbol table generation on windows (thanks Alex Brainman)
+ implement comparison rule from spec change 33abb649cb63
+ implement new slice spec (thanks Scott Lawrence)
+ make string x + y + z + ... + w efficient
+ more accurate line numbers for ATEXT
+ remove &[10]int -> []int conversion
+* go-mode.el: fix highlighting for 'chan' type (thanks Scott Lawrence)
+* godoc: better support for directory trees for user-supplied paths
+ use correct delay time (bug fix)
+* gofmt, go/printer: update internal estimated position correctly
+* goinstall: warn when package name starts with http:// (thanks Scott Lawrence)
+* http: check https certificate against host name
+ do not cache CanonicalHeaderKey (thanks Jukka-Pekka Kekkonen)
+* image: change a ColorImage's minimum point from (0, 0) to (-1e9, -1e9).
+ introduce Intersect and Union rectangle methods.
+* ld: handle quoted spaces in package path (thanks Dan Sinclair)
+* libcgo: fix NaCl build.
+* libmach: fix build on arm host
+ fix new thread race with Linux
+* math: make portable Tan(Pi/2) return NaN
+* misc/dashboard/builder: gobuilder, a continuous build client
+* net: disable tests for functions not available on windows (thanks Alex Brainman)
+* netchan: make -1 unlimited, as advertised.
+* os, exec: rename argv0 to name
+* path: add IsAbs (thanks Ivan Krasin)
+* runtime: fix bug in tracebacks
+ fix crash trace on amd64
+ fix windows build (thanks Alex Brainman)
+ use manual stack for garbage collection
+* spec: add examples for slices with omitted index expressions.
+ allow omission of low slice bound (thanks Scott Lawrence)
+* syscall: fix windows Gettimeofday (thanks Alex Brainman)
+* test(arm): disable zerodivide.go because compilation fails.
+* test(windows): disable tests that cause the build to fail (thanks Joe Poirier)
+* test/garbage/parser: sync with recent parser changes
+* test: Add test for //line
+ Make gccgo believe that the variables can change.
+ Recognize gccgo error messages.
+ Reduce race conditions in chan/nonblock.go.
+ Run garbage collector before testing malloc numbers.
+* websocket: Add support for secure WebSockets (thanks Jukka-Pekka Kekkonen)
+* windows: disable unimplemented tests (thanks Joe Poirier)
+</pre>
+
+<h2 id="2010-09-06">2010-09-06</h2>
+
+<pre>
+This release includes the syntactic modernization of more than 100 files in /test,
+and these additions, changes, and fixes:
+* 6l/8l: emit DWARF in macho.
+* 8g: use FCHS, not FMUL, for minus float.
+* 8l: emit DWARF in ELF,
+ suppress emitting DWARF in Windows PE (thanks Alex Brainman).
+* big: added RatString, some simplifications.
+* build: create bin and pkg directories as needed; drop from hg,
+ delete Make.386 Make.amd64 Make.arm (obsoleted by Make.inc),
+ fix cgo with -j2,
+ let pkg/Makefile coordinate building of Go commands,
+ never use quietgcc in Make.pkg,
+ remove more references to GOBIN and GOROOT (thanks Christian Himpel).
+* codereview: Fix uploading for Mercurial 1.6.3 (thanks Evan Shaw),
+ consistent indent, cut dead code,
+ fix hang on standard hg commands,
+ print status when tasks take longer than 30 seconds,
+ really disable codereview when not available,
+ upload files in parallel (5x improvement on large CLs).
+* crypto/hmac: make Sum idempotent (thanks Jukka-Pekka Kekkonen).
+* doc: add links to more German docs,
+ add round-robin flag to io2010 balance example,
+ fix a bug in the example in Constants subsection (thanks James Fysh),
+ various changes for validating HTML (thanks Scott Lawrence).
+* fmt: delete erroneous sentence about return value for Sprint*.
+* gc: appease bison version running on FreeBSD builder,
+ fix spurious syntax error.
+* go/doc: use correct escaper for URL.
+* go/printer: align ImportPaths in ImportDecls (thanks Scott Lawrence).
+* go/typechecker: 2nd step towards augmenting AST with full type information.
+* gofmt: permit omission of first index in slice expression.
+* goinstall: added -a flag to mean "all remote packages" (thanks Scott Lawrence),
+ assume go binaries are in path (following new convention),
+ use https for Google Code checkouts.
+* gotest: allow make test of cgo packages (without make install).
+* http: add Date to server, Last-Modified and If-Modified-Since to file server,
+ add PostForm function to post url-encoded key/value data,
+ obscure passwords in return value of URL.String (thanks Scott Lawrence).
+* image: introduce Config type and DecodeConfig function.
+* libcgo: update Makefile to use Make.inc.
+* list: update comment to state that the zero value is ready to use.
+* math: amd64 version of Sincos (thanks Charles L. Dorian).
+* misc/bash: add *.go completion for gofmt (thanks Scott Lawrence).
+* misc/emacs: make _ a word symbol (thanks Scott Lawrence).
+* misc: add zsh completion (using compctl),
+ syntax highlighting for Fraise.app (OS X) (thanks Vincent Ambo).
+* net/textproto: Handle multi-line responses (thanks Evan Shaw).
+* net: add LookupMX (thanks Corey Thomasson).
+* netchan: Fix race condition in test,
+ rather than 0, make -1 mean infinite (a la strings.Split et al),
+ use acknowledgements on export send.
+ new methods Sync and Drain for clean teardown.
+* regexp: interpret all Go characer escapes \a \b \f \n \r \t \v.
+* rpc: fix bug that caused private methods to attempt to be registered.
+* runtime: Correct commonType.kind values to match compiler,
+ add GOOS, GOARCH; fix FuncLine,
+ special case copy, equal for one-word interface values (thanks Kyle Consalus).
+* scanner: fix incorrect reporting of error in Next (thanks Kyle Consalus).
+* spec: clarify that arrays must be addressable to be sliceable.
+* template: fix space handling around actions.
+* test/solitaire: an exercise in backtracking and string conversions.
+* test: Recognize gccgo error messages and other fixes.
+* time: do not crash in String on nil Time.
+* tutorial: regenerate HTML to pick up change to progs/file.go.
+* websocket: fix missing Sec-WebSocket-Protocol on server response (thanks Jukka-Pekka Kekkonen).
+</pre>
+
+<h2 id="2010-08-25">2010-08-25</h2>
+
+<pre>
+This release includes changes to the build system that will likely require you
+to make changes to your environment variables and Makefiles.
+
+All environment variables are now optional:
+ - $GOOS and $GOARCH are now optional; their values should now be inferred
+ automatically by the build system,
+ - $GOROOT is now optional, but if you choose not to set it you must run
+ 'gomake' instead of 'make' or 'gmake' when developing Go programs
+ using the conventional Makefiles,
+ - $GOBIN remains optional and now defaults to $GOROOT/bin;
+ if you wish to use this new default, make sure it is in your $PATH
+ and that you have removed the existing binaries from $HOME/bin.
+
+As a result of these changes, the Go Makefiles have changed. If your Makefiles
+inherit from the Go Makefiles, you must change this line:
+ include ../../Make.$(GOARCH)
+to this:
+ include ../../Make.inc
+
+This release also removes the deprecated functions in regexp and the
+once package. Any code that still uses them will break.
+See the notes from the last release for details:
+ http://golang.org/doc/devel/release.html#2010-08-11
+
+Other changes:
+* 6g: better registerization for slices, strings, interface values
+* 6l: line number information in DWARF format
+* build: $GOBIN defaults to $GOROOT/bin,
+ no required environment variables
+* cgo: add C.GoStringN (thanks Eric Clark).
+* codereview: fix issues with leading tabs in CL descriptions,
+ do not send "Abandoned" mail if the CL has not been mailed.
+* crypto/ocsp: add missing Makefile.
+* crypto/tls: client certificate support (thanks Mikkel Krautz).
+* doc: update gccgo information for recent changes.
+ fix errors in Effective Go.
+* fmt/print: give %p priority, analogous to %T,
+ honor Formatter in Print, Println.
+* gc: fix parenthesization check.
+* go/ast: facility for printing AST nodes,
+ first step towards augmenting AST with full type information.
+* go/printer: do not modify tabwriter.Escape'd text.
+* gofmt: do not modify multi-line string literals,
+ print AST nodes by setting -ast flag.
+* http: fix typo in http.Request documentation (thanks Scott Lawrence)
+ parse query string always, not just in GET
+* image/png: support 16-bit color.
+* io: ReadAtLeast now errors if min > len(buf).
+* jsonrpc: use `error: null` for success, not `error: ""`.
+* libmach: implement register fetch for 32-bit x86 kernel.
+* net: make IPv6 String method standards-compliant (thanks Mikio Hara).
+* os: FileInfo.Permission() now returns uint32 (thanks Scott Lawrence),
+ implement env using native Windows API (thanks Alex Brainman).
+* reflect: allow PtrValue.PointTo(nil).
+* runtime: correct line numbers for .goc files,
+ fix another stack split bug,
+ fix freebsd/386 mmap.
+* syscall: regenerate syscall/z* files for linux/386, linux/amd64, linux/arm.
+* tabwriter: Introduce a new flag StripEscape.
+* template: fix handling of space around actions,
+ vars preceded by white space parse correctly (thanks Roger Peppe).
+* test: add test case that crashes gccgo.
+* time: parse no longer requires minutes for time zone (thanks Jan H. Hosang)
+* yacc: fix bounds check in error recovery.
+</pre>
+
+<h2 id="2010-08-11">2010-08-11</h2>
+
+<pre>
+This release introduces some package changes. You may need to change your
+code if you use the once, regexp, image, or exp/draw packages.
+
+The type Once has been added to the sync package. The new sync.Once will
+supersede the functionality provided by the once package. We intend to remove
+the once package after this release. See:
+ http://golang.org/pkg/sync/#Once
+All instances of once in the standard library have been replaced with
+sync.Once. Reviewing these changes may help you modify your existing code.
+The relevant changeset:
+ http://code.google.com/p/go/source/detail?r=fa2c43595119
+
+A new set of methods has been added to the regular expression package, regexp.
+These provide a uniformly named approach to discovering the matches of an
+expression within a piece of text; see the package documentation for details:
+ http://golang.org/pkg/regexp/
+These new methods will, in a later release, replace the old methods for
+matching substrings. The following methods are deprecated:
+ Execute (use FindSubmatchIndex)
+ ExecuteString (use FindStringSubmatchIndex)
+ MatchStrings(use FindStringSubmatch)
+ MatchSlices (use FindSubmatch)
+ AllMatches (use FindAll; note that n<0 means 'all matches'; was n<=0)
+ AllMatchesString (use FindAllString; note that n<0 means 'all matches'; was n<=0)
+(Plus there are ten new methods you didn't know you wanted.)
+Please update your code to use the new routines before the next release.
+
+An image.Image now has a Bounds rectangle, where previously it ranged
+from (0, 0) to (Width, Height). Loops that previously looked like:
+ for y := 0; y < img.Height(); y++ {
+ for x := 0; x < img.Width(); x++ {
+ // Do something with img.At(x, y)
+ }
+ }
+should instead be:
+ b := img.Bounds()
+ for y := b.Min.Y; y < b.Max.Y; y++ {
+ for x := b.Min.X; x < b.Max.X; x++ {
+ // Do something with img.At(x, y)
+ }
+ }
+The Point and Rectangle types have also moved from exp/draw to image.
+
+Other changes:
+* arm: bugfixes and syscall (thanks Kai Backman).
+* asn1: fix incorrect encoding of signed integers (thanks Nicholas Waples).
+* big: fixes to bitwise functions (thanks Evan Shaw).
+* bytes: add IndexRune, FieldsFunc and To*Special (thanks Christian Himpel).
+* encoding/binary: add complex (thanks Roger Peppe).
+* exp/iterable: add UintArray (thanks Anschel Schaffer-Cohen).
+* godoc: report Status 404 if a pkg or file is not found.
+* gofmt: better reporting for unexpected semicolon errors.
+* html: new package, an HTML tokenizer.
+* image: change image representation from slice-of-slices to linear buffer,
+ introduce Decode and RegisterFormat,
+ introduce Transparent and Opaque,
+ replace Width and Height by Bounds, add the Point and Rect types.
+* libbio: fix Bprint to address 6g issues with large data structures.
+* math: fix amd64 Hypot (thanks Charles L. Dorian).
+* net/textproto: new package, with example net/dict.
+* os: fix ForkExec() handling of envv == nil (thanks Alex Brainman).
+* png: grayscale support (thanks Mathieu Lonjaret).
+* regexp: document that backslashes are the escape character.
+* rpc: catch errors from ReadResponseBody.
+* runtime: memory free fix (thanks Alex Brainman).
+* template: add ParseFile method to template.Template.
+* test/peano: use directly recursive type def.
+</pre>
+
+<h2 id="2010-08-04">2010-08-04</h2>
+
+<pre>
+This release includes a change to os.Open (and co.). The file permission
+argument has been changed to a uint32. Your code may require changes - a simple
+conversion operation at most.
+
+Other changes:
+* amd64: use segment memory for thread-local storage.
+* arm: add gdb support to android launcher script,
+ bugfixes (stack clobbering, indices),
+ disable another flaky test,
+ remove old qemu dependency from gotest.
+* bufio: introduce Peek.
+* bytes: added test case for explode with blank string (thanks Scott Lawrence).
+* cgo: correct multiple return value function invocations (thanks Christian Himpel).
+* crypto/x509: unwrap Subject Key Identifier (thanks Adam Langley).
+* gc: index bounds tests and other fixes.
+* gofmt/go/parser: strengthen syntax checks.
+* goinstall: check for error from exec.*Cmd.Wait() (thanks Alex Brainman).
+* image/png: use image-specific methods for checking opacity.
+* image: introduce Gray and Gray16 types,
+ remove the named colors except for Black and White.
+* json: object members must have a value (thanks Anthony Martin).
+* misc/vim: highlight misspelled words only in comments (thanks Christian Himpel).
+* os: Null device (thanks Peter Mundy).
+* runtime: do not fall through in SIGBUS/SIGSEGV.
+* strings: fix Split("", "", -1) (thanks Scott Lawrence).
+* syscall: make go errors not clash with windows errors (thanks Alex Brainman).
+* test/run: diff old new,
+* websocket: correct challenge response (thanks Tarmigan Casebolt),
+ fix bug involving spaces in header keys (thanks Bill Neubauer).
+</pre>
+
+<h2 id="2010-07-29">2010-07-29</h2>
+
+<pre>
+* 5g: more soft float support and several bugfixes.
+* asn1: Enumerated, Flag and GeneralizedTime support.
+* build: clean.bash to check that GOOS and GOARCH are set.
+* bytes: add IndexFunc and LastIndexFunc (thanks Fazlul Shahriar),
+ add Title.
+* cgo: If CC is set in environment, use it rather than "gcc",
+ use new command line syntax: -- separates cgo flags from gcc flags.
+* codereview: avoid crash if no config,
+ don't run gofmt with an empty file list,
+ make 'hg submit' work with Mercurial 1.6.
+* crypto/ocsp: add package to parse OCSP responses.
+* crypto/tls: add client-side SNI support and PeerCertificates.
+* exp/bignum: delete package - functionality subsumed by package big.
+* fmt.Print: fix bug in placement of spaces introduced when ...T went in.
+* fmt.Scanf: handle trailing spaces.
+* gc: fix smaller-than-pointer-sized receivers in interfaces,
+ floating point precision/normalization fixes,
+ graceful exit on seg fault,
+ import dot shadowing bug,
+ many fixes including better handling of invalid input,
+ print error detail about failure to open import.
+* gccgo_install.html: add description of the port to RTEMS (thanks Vinu Rajashekhar).
+* gobs: fix bug in singleton arrays.
+* godoc: display synopses for all packages that have some kind of documentation..
+* gofmt: fix some linebreak issues.
+* http: add https client support (thanks Fazlul Shahriar),
+ write body when content length unknown (thanks James Whitehead).
+* io: MultiReader and MultiWriter (thanks Brad Fitzpatrick),
+ fix another race condition in Pipes.
+* ld: many fixes including better handling of invalid input.
+* libmach: correct handling of .5 files with D_REGREG addresses.
+* linux/386: use Xen-friendly ELF TLS instruction sequence.
+* mime: add AddExtensionType (thanks Yuusei Kuwana).
+* misc/vim: syntax file recognizes constants like 1e9 (thanks Petar Maymounkov).
+* net: TCPConn.SetNoDelay, back by popular demand.
+* net(windows): fix crashing Read/Write when passed empty slice on (thanks Alex Brainman),
+ implement LookupHost/Port/SRV (thanks Wei Guangjing),
+ properly handle EOF in (*netFD).Read() (thanks Alex Brainman).
+* runtime: fix bug introduced in revision 4a01b8d28570 (thanks Alex Brainman),
+ rename cgo2c, *.cgo to goc2c, *.goc (thanks Peter Mundy).
+* scanner: better comment.
+* strings: add Title.
+* syscall: add ForkExec, Syscall12 on Windows (thanks Daniel Theophanes),
+ improve windows errno handling (thanks Alex Brainman).
+* syscall(windows): fix FormatMessage (thanks Peter Mundy),
+ implement Pipe() (thanks Wei Guangjing).
+* time: fix parsing of minutes in time zones.
+* utf16(windows): fix cyclic dependency when testing (thanks Peter Mundy).
+</pre>
+
+<h2 id="2010-07-14">2010-07-14</h2>
+
+<pre>
+This release includes a package change. In container/vector, the Iter method
+has been removed from the Vector, IntVector, and StringVector types. Also, the
+Data method has been renamed to Copy to better express its actual behavior.
+Now that Vector is just a slice, any for loops ranging over v.Iter() or
+v.Data() can be changed to range over v instead.
+
+Other changes:
+* big: Improvements to Rat.SetString (thanks Evan Shaw),
+ add sign, abs, Rat.IsInt.
+* cgo: various bug fixes.
+* codereview: Fix for Mercurial >= 1.6 (thanks Evan Shaw).
+* crypto/rand: add Windows implementation (thanks Peter Mundy).
+* crypto/tls: make HTTPS servers easier,
+ add client OCSP stapling support.
+* exp/eval: converted from bignum to big (thanks Evan Shaw).
+* gc: implement new len spec, range bug fix, optimization.
+* go/parser: require that '...' parameters are followed by a type.
+* http: fix ParseURL to handle //relative_path properly.
+* io: fix SectionReader Seek to seek backwards (thanks Peter Mundy).
+* json: Add HTMLEscape (thanks Micah Stetson).
+* ld: bug fixes.
+* math: amd64 version of log (thanks Charles L. Dorian).
+* mime/multipart: new package to parse multipart MIME messages
+ and HTTP multipart/form-data support.
+* os: use TempFile with default TempDir for test files (thanks Peter Mundy).
+* runtime/tiny: add docs for additional VMs, fix build (thanks Markus Duft).
+* runtime: better error for send/recv on nil channel.
+* spec: clarification of channel close(),
+ lock down some details about channels and select,
+ restrict when len(x) is constant,
+ specify len/cap for nil slices, maps, and channels.
+* windows: append .exe to binary names (thanks Joe Poirier).
+</pre>
+
+<h2 id="2010-07-01">2010-07-01</h2>
+
+<pre>
+This release includes some package changes that may require changes to
+client code.
+
+The Split function in the bytes and strings packages has been changed.
+The count argument, which limits the size of the return, previously treated
+zero as unbounded. It now treats 0 as 0, and will return an empty slice.
+To request unbounded results, use -1 (or some other negative value).
+The new Replace functions in bytes and strings share this behavior.
+This may require you change your existing code.
+
+The gob package now allows the transmission of non-struct values at the
+top-level. As a result, the rpc and netchan packages have fewer restrictions
+on the types they can handle. For example, netchan can now share a chan int.
+
+The release also includes a Code Walk: "Share Memory By Communicating".
+It describes an idiomatic Go program that uses goroutines and channels:
+ http://golang.org/doc/codewalk/sharemem/
+
+There is now a Projects page on the Go Dashboard that lists Go programs,
+tools, and libraries:
+ http://godashboard.appspot.com/project
+
+Other changes:
+* 6a, 6l: bug fixes.
+* bytes, strings: add Replace.
+* cgo: use slash-free relative paths for .so references.
+* cmath: correct IsNaN for argument cmplx(Inf, NaN) (thanks Charles L. Dorian).
+* codereview: allow multiple email addresses in CONTRIBUTORS.
+* doc/codewalk: add Share Memory By Communicating.
+* exp/draw/x11: implement the mapping from keycodes to keysyms.
+* fmt: Printf: fix bug in handling of %#v, allow other verbs for slices
+ Scan: fix handling of EOFs.
+* gc: bug fixes and optimizations.
+* gob: add DecodeValue and EncodeValue,
+ add support for complex numbers.
+* goinstall: support for Bazaar+Launchpad (thanks Gustavo Niemeyer).
+* io/ioutil: add TempFile for Windows (thanks Peter Mundy).
+* ld: add -u flag to check safe bits; discard old -u, -x flags.
+* math: amd64 versions of Exp and Fabs (thanks Charles L. Dorian).
+* misc/vim: always override filetype detection for .go files.
+* net: add support for DNS SRV requests (thanks Kirklin McDonald),
+ initial attempt to implement Windows version (thanks Alex Brainman).
+* netchan: allow chan of basic types now that gob can handle such,
+ eliminate the need for a pointer value in Import and Export.
+* os/signal: only catch all signals if os/signal package imported.
+* regexp: bug fix: need to track whether match begins with fixed prefix.
+* rpc: allow non-struct args and reply (they must still be pointers).
+* runtime: bug fixes and reorganization.
+* strconv: fix bugs in floating-point and base 2 conversions
+* syscall: add syscall_bsd.go to zsycall_freebsd_386.go (thanks Peter Mundy),
+ add socketpair (thanks Ivan Krasin).
+* time: implement time zones for Windows (thanks Alex Brainman).
+* x509: support non-self-signed certs.
+</pre>
+
+<h2 id="2010-06-21">2010-06-21</h2>
+
+<pre>
+This release includes a language change. The "..." function parameter form is
+gone; "...T" remains. Typically, "...interface{}" can be used instead of "...".
+
+The implementation of Printf has changed in a way that subtly affects its
+handling of the fmt.Stringer interface. You may need to make changes to your
+code. For details, see:
+ https://groups.google.com/group/golang-nuts/msg/6fffba90a3e3dc06
+
+The reflect package has been changed. If you have code that uses reflect,
+it will need to be updated. For details, see:
+ https://groups.google.com/group/golang-nuts/msg/7a93d07c590e7beb
+
+Other changes:
+* 8l: correct test for sp == top of stack in 8l -K code.
+* asn1: allow '*' in PrintableString.
+* bytes.Buffer.ReadFrom: fix bug.
+* codereview: avoid exception in match (thanks Paolo Giarrusso).
+* complex divide: match C99 implementation.
+* exp/draw: small draw.drawGlyphOver optimization.
+* fmt: Print*: reimplement to switch on type first,
+ Scanf: improve error message when input does not match format.
+* gc: better error messages for interface failures, conversions, undefined symbols.
+* go/scanner: report illegal escape sequences.
+* gob: substitute slice for map.
+* goinstall: process dependencies for package main (thanks Roger Peppe).
+* gopack: add S flag to force marking a package as safe,
+ simplify go metadata code.
+* html: sync testdata/webkit to match WebKit tip.
+* http: reply to Expect 100-continue requests automatically (thanks Brad Fitzpatrick).
+* image: add an Alpha16 type.
+* ld: pad Go symbol table out to page boundary (fixes cgo crash).
+* misc/vim: reorganize plugin to be easier to use (thanks James Whitehead).
+* path: add Base, analogous to Unix basename.
+* pkg/Makefile: allow DISABLE_NET_TESTS=1 to disable network tests.
+* reflect: add Kind, Type.Bits, remove Int8Type, Int8Value, etc.
+* runtime: additional Windows support (thanks Alex Brainman),
+ correct fault for 16-bit divide on Leopard,
+ fix 386 signal handler bug.
+* strconv: add AtofN, FtoaN.
+* string: add IndexFunc and LastIndexFunc (thanks Roger Peppe).
+* syslog: use local network for tests.
+</pre>
+
+<h2 id="2010-06-09">2010-06-09</h2>
+
+<pre>
+This release contains many fixes and improvements, including several
+clarifications and consolidations to the Language Specification.
+
+The type checking rules around assignments and conversions are simpler but more
+restrictive: assignments no longer convert implicitly from *[10]int to []int
+(write x[0:] instead of &x), and conversions can no longer change the names of
+types inside composite types.
+
+The fmt package now includes flexible type-driven (fmt.Scan) and
+format-driven (fmt.Scanf) scanners for all basic types.
+
+* big: bug fix for Quo aliasing problem.
+* bufio: change ReadSlice to match description.
+* cgo: bug fixes.
+* doc: add Google I/O talk and programs,
+ codereview + Mercurial Queues info (thanks Peter Williams).
+* exp/draw: Draw fast paths for the Over operator,
+ add Rectangle.Eq and Point.In, fix Rectangle.Clip (thanks Roger Peppe).
+* fmt: Scan fixes and improvements.
+* gc: backslash newline is not a legal escape sequence in strings,
+ better error message when ~ operator is found,
+ fix export of complex types,
+ new typechecking rules.
+* go/parser: correct position of empty statement ';'.
+* gofmt: fix test script.
+* goinstall: use 'git pull' instead of 'git checkout' (thanks Michael Hoisie).
+* http: add Head function for making HTTP HEAD requests,
+ handle status 304 correctly.
+* image: add Opaque method to the image types.
+ make Color.RGBA return 16 bit color instead of 32 bit color.
+* io/ioutil: add TempFile.
+* math: Pow special cases and additional tests (thanks Charles L. Dorian).
+* netchan: improve closing and shutdown.
+* os: implement os.FileInfo.*time_ns for windows (thanks Alex Brainman).
+* os/signal: correct the regexp for finding Unix signal names (thanks Vinu Rajashekhar).
+* regexp: optimizations (thanks Kyle Consalus).
+* runtime: fix printing -Inf (thanks Evan Shaw),
+ finish pchw -> tiny, added gettime for tiny (thanks Daniel Theophanes).
+* spec: clean-ups and consolidation.
+* syscall: additional Windows compatibility fixes (thanks Alex Brainman).
+* test/bench: added regex-dna-parallel.go (thanks Kyle Consalus).
+* vector: type-specific Do functions now take f(type) (thanks Michael Hoisie).
+</pre>
+
+<h2 id="2010-05-27">2010-05-27</h2>
+
+<pre>
+A sizeable release, including standard library improvements and a slew of
+compiler bug fixes. The three-week interval was largely caused by the team
+preparing for Google I/O.
+
+* big: add Rat type (thanks Evan Shaw),
+ new features, much performance tuning, cleanups, and more tests.
+* bignum: deprecate by moving into exp directory.
+* build: allow MAKEFLAGS to be set outside the build scripts (thanks Christopher Wedgwood).
+* bytes: add Trim, TrimLeft, TrimRight, and generic functions (thanks Michael Hoisie).
+* cgo: fix to permit cgo callbacks from init code.
+* cmath: update range of Phase and Polar due to signed zero (thanks Charles L. Dorian).
+* codereview: work better with mq (thanks Peter Williams).
+* compress: renamings
+ NewDeflater -> NewWriter
+ NewInflater -> NewReader
+ Deflater -> Compressor
+ Inflater -> Decompressor
+* exp/draw/x11: respect $XAUTHORITY,
+ treat $DISPLAY the same way x-go-bindings does.
+* exp/draw: fast path for glyph images, other optimizations,
+ fix Rectangle.Canon (thanks Roger Peppe).
+* fmt: Scan, Scanln: Start of a simple scanning API in the fmt package,
+ fix Printf crash when given an extra nil argument (thanks Roger Peppe).
+* gc: better error when computing remainder of non-int (thanks Evan Shaw),
+ disallow middot in Go programs,
+ distinguish array, slice literal in error messages,
+ fix shift/reduce conflict in go.y export syntax,
+ fix unsafe.Sizeof on ideal constants,
+ handle use of builtin function outside function call,
+ many other bug fixes.
+* gob: add support for maps,
+ add test for indirect maps, slices, arrays.
+* godoc: collect package comments from all package files.
+* gofmt: don't lose mandatory semicolons,
+ exclude test w/ illegal syntax from test cases,
+ fix printing of labels.
+* http: prevent crash if remote server is not responding with "HTTP/".
+* json: accept escaped slash in string scanner (thanks Michael Hoisie),
+ fix array -> non-array decoding.
+* libmach: skip __nl_symbol_ptr section on OS X.
+* math: amd64 versions of Fdim, Fmax, Fmin,
+ signed zero Sqrt special case (thanks Charles L. Dorian).
+* misc/kate: convert isn't a built in function (thanks Evan Shaw).
+* net: implement BindToDevice,
+ implement raw sockets (thanks Christopher Wedgwood).
+* netFD: fix race between Close and Read/Write (thanks Michael Hoisie).
+* os: add Chtimes function (thanks Brad Fitzpatrick).
+* pkg/Makefile: add netchan to standard package list.
+* runtime: GOMAXPROCS returns previous value,
+ allow large map values,
+ avoid allocation for fixed strings,
+ correct tracebacks for nascent goroutines, even closures,
+ free old hashmap pieces during resizing.
+* spec: added imaginary literal to semicolon rules (was missing),
+ fix and clarify syntax of conversions,
+ simplify section on channel types,
+ other minor tweaks.
+* strconv: Btoui64 optimizations (thanks Kyle Consalus).
+* strings: use copy instead of for loop in Map (thanks Kyle Consalus).
+* syscall: implement BindToDevice (thanks Christopher Wedgwood),
+ add Utimes on Darwin/FreeBSD, add Futimes everywhere,
+ regenerate syscalls for some platforms.
+* template: regularize name lookups of interfaces, pointers, and methods.
+</pre>
+
+<h2 id="2010-05-04">2010-05-04</h2>
+
+<pre>
+In this release we renamed the Windows OS target from 'mingw' to 'windows'.
+If you are currently building for 'mingw' you should set GOOS=windows instead.
+
+* 5l, 6l, 8l, runtime: make -s binaries work.
+* 5l, 6l, 8l: change ELF header so that strip doesn't destroy binary.
+* 8l: fix absolute path detection on Windows.
+* big: new functions, optimizations, and cleanups,
+ add bitwise methods for Int (thanks Evan Shaw).
+* bytes: Change IndexAny to look for UTF-8 encoded characters.
+* darwin: bsdthread_create can fail; print good error.
+* fmt: %T missing print <nil> for nil (thanks Christopher Wedgwood).
+* gc: many fixes.
+* misc/cgo/gmp: fix bug in SetString.
+* net: fix resolv.conf EOF without newline bug (thanks Christopher Wedgwood).
+* spec: some small clarifications (no language changes).
+* syscall: add EWOULDBLOCK to sycall_nacl.go,
+ force O_LARGEFILE in Linux open system call,
+ handle EOF on pipe - special case on Windows (thanks Alex Brainman),
+ mingw Sleep (thanks Joe Poirier).
+* test/bench: import new fasta C reference, update Go, optimizations.
+* test: test of static initialization (fails).
+* vector: use correct capacity in call to make.
+* xml: allow text segments to end at EOF.
+</pre>
+
+<h2 id="2010-04-27">2010-04-27</h2>
+
+<pre>
+This release includes a new Codelab that illustrates the construction of a
+simple wiki web application:
+ http://golang.org/doc/codelab/wiki/
+
+It also includes a Codewalk framework for documenting code. See:
+ http://golang.org/doc/codewalk/
+
+Other changes:
+* 6g: fix need for parens around array index expression.
+* 6l, 8l: include ELF header in PT_LOAD mapping for text segment.
+* arm: add android runner script,
+ support for printing floats.
+* big: implemented Karatsuba multiplication,
+ many fixes and improvements (thanks Evan Shaw).
+* bytes: add Next method to Buffer, simplify Read,
+ shuffle implementation, making WriteByte 50% faster.
+* crypto/tls: simpler implementation of record layer.
+* exp/eval: fixes (thanks Evan Shaw).
+* flag: eliminate unnecessary structs.
+* gc: better windows support,
+ cmplx typecheck bug fix,
+ more specific error for statements at top level.
+* go/parser: don't require unnecessary parens.
+* godoc: exclude duplicate entries (thanks Andrei Vieru),
+ use int64 for timestamps (thanks Christopher Wedgwood).
+* gofmt: fine-tune stripping of parentheses,
+* json: Marshal, Unmarshal using new scanner,
+ preserve field name case by default,
+ scanner, Compact, Indent, and tests,
+ support for streaming.
+* libmach: disassemble MOVLQZX correctly.
+* math: more special cases for signed zero (thanks Charles L. Dorian).
+* net: add Pipe,
+ fix bugs in packStructValue (thanks Michael Hoisie),
+ introduce net.Error interface.
+* os: FileInfo: regularize the types of some fields,
+ create sys_bsd.go (thanks Giles Lean),
+ mingw bug fixes (thanks Alex Brainman).
+* reflect: add FieldByNameFunc (thanks Raif S. Naffah),
+ implement Set(nil), SetValue(nil) for PtrValue and MapValue.
+* regexp: allow escaping of any punctuation.
+* rpc/jsonrpc: support for jsonrpc wire encoding.
+* rpc: abstract client and server encodings,
+ add Close() method to rpc.Client.
+* runtime: closures, defer bug fix for Native Client,
+ rename cgo2c, *.cgo to goc2c, *.goc to avoid confusion with real cgo.
+ several other fixes.
+* scanner: implement Peek() to look at the next char w/o advancing.
+* strings: add ReadRune to Reader, add FieldsFunc (thanks Kyle Consalus).
+* syscall: match linux Setsid function signature to darwin,
+ mingw bug fixes (thanks Alex Brainman).
+* template: fix handling of pointer inside interface.
+* test/bench: add fannkuch-parallel.go (thanks Kyle Consalus),
+ pidigits ~10% performance win by using adds instead of shifts.
+* time: remove incorrect time.ISO8601 and add time.RFC3339 (thanks Micah Stetson).
+* utf16: add DecodeRune, EncodeRune.
+* xml: add support for XML marshalling embedded structs (thanks Raif S. Naffah),
+ new "innerxml" tag to collect inner XML.
+</pre>
+
+<h2 id="2010-04-13">2010-04-13</h2>
+
+<pre>
+This release contains many changes:
+
+* 8l: add DOS stub to PE binaries (thanks Evan Shaw).
+* cgo: add //export.
+* cmath: new complex math library (thanks Charles L. Dorian).
+* docs: update to match current coding style (thanks Christopher Wedgwood).
+* exp/eval: fix example and add target to Makefile (thanks Evan Shaw).
+* fmt: change behaviour of format verb %b to match %x when negative (thanks Andrei Vieru).
+* gc: compile s == "" as len(s) == 0,
+ distinguish fatal compiler bug from error+exit,
+ fix alignment on non-amd64,
+ good syntax error for defer func() {} - missing fina (),
+ implement panic and recover,
+ zero unnamed return values on entry if func has defer.
+* goyacc: change to be reentrant (thanks Roger Peppe).
+* io/ioutil: fix bug in ReadFile when Open succeeds but Stat fails.
+* kate: update for recent language changes (thanks Evan Shaw).
+* libcgo: initial mingw port work - builds but untested (thanks Joe Poirier).
+* math: new functions and special cases (thanks Charles L. Dorian)
+* net: use chan bool instead of chan *netFD to avoid cycle.
+* netchan: allow client to send as well as receive.
+* nntp: new package, NNTP client (thanks Conrad Meyer).
+* os: rename os.Dir to os.FileInfo.
+* rpc: don't log normal EOF,
+ fix ServeConn to block as documented.
+* runtime: many bug fixes, better ARM support.
+* strings: add IndexRune, Trim, TrimLeft, TrimRight, etc (thanks Michael Hoisie).
+* syscall: implement some mingw syscalls required by os (thanks Alex Brainman).
+* test/bench: add k-nucleotide-parallel (thanks Kyle Consalus).
+* Unicode: add support for Turkish case mapping.
+* xgb: move from the main repository to http://code.google.com/p/x-go-binding/
+</pre>
+
+<h2 id="2010-03-30">2010-03-30</h2>
+
+<pre>
+This release contains three language changes:
+
+1. Accessing a non-existent key in a map is no longer a run-time error.
+It now evaluates to the zero value for that type. For example:
+ x := myMap[i] is now equivalent to: x, _ := myMap[i]
+
+2. It is now legal to take the address of a function's return value.
+The return values are copied back to the caller only after deferred
+functions have run.
+
+3. The functions panic and recover, intended for reporting and recovering from
+failure, have been added to the spec:
+ http://golang.org/doc/go_spec.html#Handling_panics
+In a related change, panicln is gone, and panic is now a single-argument
+function. Panic and recover are recognized by the gc compilers but the new
+behavior is not yet implemented.
+
+The ARM build is broken in this release; ARM users should stay at release.2010-03-22.
+
+Other changes:
+* bytes, strings: add IndexAny.
+* cc/ld: Add support for #pragma dynexport,
+ Rename dynld to dynimport throughout. Cgo users will need to rerun cgo.
+* expvar: default publishings for cmdline, memstats
+* flag: add user-defined flag types.
+* gc: usual bug fixes
+* go/ast: generalized ast filtering.
+* go/printer: avoid reflect in print.
+* godefs: fix handling of negative constants.
+* godoc: export pprof debug information, exported variables,
+ support for filtering of command-line output in -src mode,
+ use http GET for remote search instead of rpc.
+* gofmt: don't convert multi-line functions into one-liners,
+ preserve newlines in multiline selector expressions (thanks Risto Jaakko Saarelma).
+* goinstall: include command name in error reporting (thanks Andrey Mirtchovski)
+* http: add HandleFunc as shortcut to Handle(path, HandlerFunc(func))
+* make: use actual dependency for install
+* math: add J1, Y1, Jn, Yn, J0, Y0 (Bessel functions) (thanks Charles L. Dorian)
+* prof: add pprof from google-perftools
+* regexp: don't return non-nil *Regexp if there is an error.
+* runtime: add Callers,
+ add malloc sampling, pprof interface,
+ add memory profiling, more statistics to runtime.MemStats,
+ implement missing destroylock() (thanks Alex Brainman),
+ more malloc statistics,
+ run all finalizers in a single goroutine,
+ Goexit runs deferred calls.
+* strconv: add Atob and Btoa,
+ Unquote could wrongly return a nil error on error (thanks Roger Peppe).
+* syscall: add IPV6 constants,
+ add syscall_bsd.go for Darwin and other *BSDs (thanks Giles Lean),
+ implement SetsockoptString (thanks Christopher Wedgwood).
+* websocket: implement new protocol (thanks Fumitoshi Ukai).
+* xgb: fix request length and request size (thanks Firmansyah Adiputra).
+* xml: add CopyToken (thanks Kyle Consalus),
+ add line numbers to syntax errors (thanks Kyle Consalus),
+ use io.ReadByter in place of local readByter (thanks Raif S. Naffah).
+</pre>
+
+<h2 id="2010-03-22">2010-03-22</h2>
+
+<pre>
+With this release we announce the launch of the Go Blog:
+ http://blog.golang.org/
+The first post is a brief update covering what has happened since the launch.
+
+This release contains some new packages and functionality, and many fixes:
+* 6g/8g: fix issues with complex data types, other bug fixes.
+* Makefiles: refactored to make writing external Makefiles easier.
+* crypto/rand: new package.
+* godoc: implemented command-line search via RPC,
+ improved comment formatting: recognize URLs.
+* gofmt: more consistent formatting of const/var decls.
+* http: add Error helper function,
+ add ParseQuery (thanks Petar Maymounkov),
+ change RawPath to mean raw path, not raw everything-after-scheme.
+* image/jpeg: fix typos.
+* json: add MarshalIndent (accepts user-specified indent string).
+* math: add Gamma function (thanks Charles L. Dorian).
+* misc/bbedit: support for cmplx, real, imag (thanks Anthony Starks).
+* misc/vim: add new complex types, functions and literals.
+* net: fix IPMask.String not to crash on all-0xff mask.
+* os: drop File finalizer after normal Close.
+* runtime: add GOROOT and Version,
+ lock finalizer table accesses.
+* sha512: add sha384 (truncated version) (thanks Conrad Meyer).
+* syscall: add const ARCH, analogous to OS.
+* syscall: further additions to mingw port (thanks Alex Brainman).
+* template: fixed html formatter []byte input bug.
+* utf16: new package.
+* version.bash: cope with ancient Mercurial.
+* websocket: use URL.RawPath to construct WebSocket-Location: header.
+</pre>
+
+<h2 id="2010-03-15">2010-03-15</h2>
+
+<pre>
+This release includes a language change: support for complex numbers.
+ http://golang.org/doc/go_spec.html#Imaginary_literals
+ http://golang.org/doc/go_spec.html#Complex_numbers
+There is no library support as yet.
+
+This release also includes the goinstall command-line tool.
+ http://golang.org/cmd/goinstall/
+ http://groups.google.com/group/golang-nuts/t/f091704771128e32
+
+* 5g/6g/8g: fix double function call in slice.
+* arm: cleanup build warnings. (thanks Dean Prichard)
+* big: fix mistakes with probablyPrime.
+* bufio: add WriteRune.
+* bytes: add ReadRune and WriteRune to bytes.Buffer.
+* cc: stack split bug fix.
+* crypto: add SHA-224 to sha256, add sha512 package. (thanks Conrad Meyer)
+* crypto/ripemd160: new package. (thanks Raif S. Naffah)
+* crypto/rsa: don't use safe primes.
+* gc: avoid fixed length buffer cleanbuf. (thanks Dean Prichard)
+ better compilation of floating point +=
+ fix crash on complicated arg to make slice.
+ remove duplicate errors, give better error for I.(T)
+* godoc: support for multiple packages in a directory, other fixes.
+* gofmt: bug fixes.
+* hash: add Sum64 interface.
+* hash/crc32: add Update function.
+* hash/crc64: new package implementing 64-bit CRC.
+* math: add ilogb, logb, remainder. (thanks Charles L. Dorian)
+* regexp: add ReplaceAllFunc, ReplaceAllStringFunc.
+* runtime: clock garbage collection on bytes allocated, not pages in use.
+* strings: make Split(s, "", n) faster. (thanks Spring Mc)
+* syscall: minimal mingw version of syscall. (thanks Alex Brainman)
+* template: add ParseFile, MustParseFile.
+</pre>
+
+<h2 id="2010-03-04">2010-03-04</h2>
+
+<pre>
+There is one language change: the ability to convert a string to []byte or
+[]int. This deprecates the strings.Bytes and strings.Runes functions.
+You can convert your existing sources using these gofmt commands:
+ gofmt -r 'strings.Bytes(x) -> []byte(x)' -w file-or-directory-list
+ gofmt -r 'strings.Runes(x) -> []int(x)' -w file-or-directory-list
+After running these you might need to delete unused imports of the "strings"
+package.
+
+Other changes and fixes:
+* 6l/8l/5l: add -r option
+* 8g: make a[byte(x)] truncate x
+* codereview.py: fix for compatibility with hg >=1.4.3
+* crypto/blowfish: new package (thanks Raif S. Naffah)
+* dashboard: more performance tuning
+* fmt: use String method in %q to get the value to quote.
+* gofmt: several cosmetic changes
+* http: fix handling of Connection: close, bug in http.Post
+* net: correct DNS configuration,
+ fix network timeout boundary condition,
+ put [ ] around IPv6 addresses for Dial.
+* path: add Match,
+ fix bug in Match with non-greedy stars (thanks Kevin Ballard)
+* strings: delete Bytes, Runes (see above)
+* tests: an Eratosthenesque concurrent prime sieve (thanks Anh Hai Trinh)
+</pre>
+
+<h2 id="2010-02-23">2010-02-23</h2>
+
+<pre>
+This release is mainly bug fixes and a little new code.
+There are no language changes.
+
+6g/5g/8g: bug fixes
+8a/8l: Added FCMOVcc instructions (thanks Evan Shaw and Charles Dorian)
+crypto/x509: support certificate creation
+dashboard: caching to avoid datastore queries
+exec: add dir argument to Run
+godoc: bug fixes and code cleanups
+http: continued implementation and bug fixes (thanks Petar Maymounkov)
+json: fix quoted strings in Marshal (thanks Sergei Skorobogatov)
+math: more functions, test cases, and benchmarks (thanks Charles L. Dorian)
+misc/bbedit: treat predeclared identifiers as "keywords" (thanks Anthony Starks)
+net: disable UDP server test (flaky on various architectures)
+runtime: work around Linux kernel bug in futex,
+ pchw is now tiny
+sync: fix to work on armv5 (thanks Dean Prichard)
+websocket: fix binary frame size decoding (thanks Timo Savola)
+xml: allow unquoted attribute values in non-Strict mode (thanks Amrut Joshi)
+ treat bool as value in Unmarshal (thanks Michael Hoisie)
+</pre>
+
+<h2 id="2010-02-17">2010-02-17</h2>
+
+<pre>
+There are two small language changes:
+* NUL bytes may be rejected in souce files, and the tools do reject them.
+* Conversions from string to []int and []byte are defined but not yet implemented.
+
+Other changes and fixes:
+* 5a/6a/8a/5c/6c/8c: remove fixed-size arrays for -I and -D options (thanks Dean Prichard)
+* 5c/6c/8c/5l/6l/8l: add -V flag to display version number
+* 5c/6c/8c: use "cpp" not "/bin/cpp" for external preprocessor (thanks Giles Lean)
+* 8a/8l: Added CMOVcc instructions (thanks Evan Shaw)
+* 8l: pe executable building code changed to include import table for kernel32.dll functions (thanks Alex Brainman)
+* 5g/6g/8g: bug fixes
+* asn1: bug fixes and additions (incl marshalling)
+* build: fix build for Native Client, Linux/ARM
+* dashboard: show benchmarks, add garbage collector benchmarks
+* encoding/pem: add marshalling support
+* exp/draw: fast paths for a nil mask
+* godoc: support for directories outside $GOROOT
+* http: sort header keys when writing Response or Request to wire (thanks Petar Maymounkov)
+* math: special cases and new functions (thanks Charles Dorian)
+* mime: new package, used in http (thanks Michael Hoisie)
+* net: dns bug fix - use random request id
+* os: finalize File, to close fd.
+* path: make Join variadic (thanks Stephen Weinberg)
+* regexp: optimization bug fix
+* runtime: misc fixes and optimizations
+* syscall: make signature of Umask on OS X, FreeBSD match Linux. (thanks Giles Lean)
+</pre>
+
+<h2 id="2010-02-04">2010-02-04</h2>
+
+<pre>
+There is one language change: support for ...T parameters:
+ http://golang.org/doc/go_spec.html#Function_types
+
+You can now check build status on various platforms at the Go Dashboard:
+ http://godashboard.appspot.com
+
+* 5l/6l/8l: several minor fixes
+* 5a/6a/8a/5l/6l/8l: avoid overflow of symb buffer (thanks Dean Prichard)
+* compress/gzip: gzip deflater (i.e., writer)
+* debug/proc: add mingw specific build stubs (thanks Joe Poirier)
+* exp/draw: separate the source-point and mask-point in Draw
+* fmt: handle nils safely in Printf
+* gccgo: error messages now match those of gc
+* godoc: several fixes
+* http: bug fixes, revision of Request/Response (thanks Petar Maymounkov)
+* image: new image.A type to represent anti-aliased font glyphs
+ add named colors (e.g. image.Blue), suitable for exp/draw
+* io: fixed bugs in Pipe
+* malloc: merge into package runtime
+* math: fix tests on FreeBSD (thanks Devon H. O'Dell)
+ add functions; update tests and special cases (thanks Charles L. Dorian)
+* os/signal: send SIGCHLDs to Incoming (thanks Chris Wedgwood)
+* reflect: add StringHeader to reflect
+* runtime: add SetFinalizer
+* time: Sleep through interruptions (thanks Chris Wedgwood)
+ add RFC822 formats
+ experimental implemenation of Ticker using two goroutines for all tickers
+* xml: allow underscores in XML element names (thanks Michael Hoisie)
+ allow any scalar type in xml.Unmarshal
+</pre>
+
+<h2 id="2010-01-27">2010-01-27</h2>
+
+<pre>
+There are two small language changes: the meaning of chan <- chan int
+is now defined, and functions returning functions do not need to
+parenthesize the result type.
+
+There is one significant implementation change: the compilers can
+handle multiple packages using the same name in a single binary.
+In the gc compilers, this comes at the cost of ensuring that you
+always import a particular package using a consistent import path.
+In the gccgo compiler, the cost is that you must use the -fgo-prefix
+flag to pass a unique prefix (like the eventual import path).
+
+5a/6a/8a: avoid use of fixed-size buffers (thanks Dean Prichard)
+5g, 6g, 8g: many minor bug fixes
+bufio: give Writer.WriteString same signature as bytes.Buffer.WriteString.
+container/list: PushFrontList, PushBackList (thanks Jan Hosang)
+godoc: trim spaces from search query (thanks Christopher Wedgwood)
+hash: document that Sum does not change state, fix crypto hashes
+http: bug fixes, revision of Request/Response (thanks Petar Maymounkov)
+math: more handling of IEEE 754 special cases (thanks Charles Dorian)
+misc/dashboard: new build dashboard
+net: allow UDP broadcast,
+ use /etc/hosts to resolve names (thanks Yves Junqueira, Michael Hoisie)
+netchan: beginnings of new package for connecting channels across a network
+os: allow FQDN in Hostname test (thanks Icarus Sparry)
+reflect: garbage collection bug in Call
+runtime: demo of Go on raw (emulated) hw in runtime/pchw,
+ performance fix on OS X
+spec: clarify meaning of chan <- chan int,
+ func() func() int is allowed now,
+ define ... T (not yet implemented)
+template: can use interface values
+time: fix for +0000 time zone,
+ more robust tick.Stop.
+xgb: support for authenticated connections (thanks Firmansyah Adiputra)
+xml: add Escape (thanks Stephen Weinberg)
+</pre>
+
+<h2 id="2010-01-13">2010-01-13</h2>
+
+<pre>
+This release is mainly bug fixes with a little new code.
+There are no language changes.
+
+build: $GOBIN should no longer be required in $PATH (thanks Devon H. O'Dell),
+ new package target "make bench" to run benchmarks
+8g: faster float -> uint64 conversion (thanks Evan Shaw)
+5g, 6g, 8g:
+ clean opnames.h to avoid stale errors (thanks Yongjian Xu),
+ a handful of small compiler fixes
+5g, 6g, 8g, 5l, 6l, 8l: ignore $GOARCH, which is implied by name of tool
+6prof: support for writing input files for google-perftools's pprof
+asn1: fix a few structure-handling bugs
+cgo: many bug fixes (thanks Devon H. O'Dell)
+codereview: repeated "hg mail" sends "please take another look"
+gob: reserve ids for future expansion
+godoc: distinguish HTML generation from plain text HTML escaping (thanks Roger Peppe)
+gofmt: minor bug fixes, removed -oldprinter flag
+http: add CanonicalPath (thanks Ivan Krasin),
+ avoid header duplication in Response.Write,
+ correctly escape/unescape URL sections
+io: new interface ReadByter
+json: better error, pointer handling in Marshal (thanks Ivan Krasin)
+libmach: disassembly of FUCOMI, etc (thanks Evan Shaw)
+math: special cases for most functions and 386 hardware Sqrt (thanks Charles Dorian)
+misc/dashboard: beginning of a build dashboard at godashboard.appspot.com.
+misc/emacs: handling of new semicolon rules (thanks Austin Clements),
+ empty buffer bug fix (thanks Kevin Ballard)
+misc/kate: highlighting improvements (tahnks Evan Shaw)
+os/signal: add signal names: signal.SIGHUP, etc (thanks David Symonds)
+runtime: preliminary Windows support (thanks Hector Chu),
+ preemption polling to reduce garbage collector pauses
+scanner: new lightweight scanner package
+template: bug fix involving spaces before a delimited block
+test/bench: updated timings
+time: new Format, Parse functions
+</pre>
+
+<h2 id="2010-01-05">2010-01-05</h2>
+
+<pre>
+This release is mainly bug fixes. There are no language changes.
+
+6prof: now works on 386
+8a, 8l: add FCOMI, FCOMIP, FUCOMI, and FUCOMIP (thanks Evan Shaw)
+big: fix ProbablyPrime on small numbers
+container/vector: faster []-based implementation (thanks Jan Mercl)
+crypto/tls: extensions and Next Protocol Negotiation
+gob: one encoding bug fix, one decoding bug fix
+image/jpeg: support for RST markers
+image/png: support for transparent paletted images
+misc/xcode: improved support (thanks Ken Friedenbach)
+net: return nil Conn on error from Dial (thanks Roger Peppe)
+regexp: add Regexp.NumSubexp (thanks Peter Froehlich)
+syscall: add Nanosleep on FreeBSD (thanks Devon H. O'Dell)
+template: can use map in .repeated section
+
+There is now a public road map, in the repository and online
+at <a href="http://golang.org/doc/devel/roadmap.html">http://golang.org/doc/devel/roadmap.html</a>.
+</pre>
+
+<h2 id="2009-12-22">2009-12-22</h2>
+
+<pre>
+Since the last release there has been one large syntactic change to
+the language, already discussed extensively on this list: semicolons
+are now implied between statement-ending tokens and newline characters.
+See http://groups.google.com/group/golang-nuts/t/5ee32b588d10f2e9 for
+details.
+
+By default, gofmt now parses and prints the new lighter weight syntax.
+To convert programs written in the old syntax, you can use:
+
+ gofmt -oldparser -w *.go
+
+Since everything was being reformatted anyway, we took the opportunity to
+change the way gofmt does alignment. Now gofmt uses tabs at the start
+of a line for basic code alignment, but it uses spaces for alignment of
+interior columns. Thus, in an editor with a fixed-width font, you can
+choose your own tab size to change the indentation, and no matter what
+tab size you choose, columns will be aligned properly.
+
+
+In addition to the syntax and formatting changes, there have been many
+smaller fixes and updates:
+
+6g,8g,5g: many bug fixes, better registerization,
+ build process fix involving mkbuiltin (thanks Yongjian Xu),
+ method expressions for concrete types
+8l: support for Windows PE files (thanks Hector Chu)
+bytes: more efficient Buffer handling
+bytes, strings: new function Fields (thanks Andrey Mirtchovski)
+cgo: handling of enums (thanks Moriyoshi Koizumi),
+ handling of structs with bit fields, multiple files (thanks Devon H. O'Dell),
+ installation of .so to non-standard locations
+crypto/sha256: new package for SHA 256 (thanks Andy Davis)
+encoding/binary: support for slices of fixed-size values (thanks Maxim Ushakov)
+exp/vector: experimental alternate vector representation (thanks Jan Mercl)
+fmt: %p for chan, map, slice types
+gob: a couple more bug fixes
+http: support for basic authentication (thanks Ivan Krasin)
+image/jpeg: basic JPEG decoder
+math: correct handling of Inf and NaN in Pow (thanks Charles Dorian)
+misc/bash: completion file for bash (thanks Alex Ray)
+os/signal: support for handling Unix signals (thanks David Symonds)
+rand: Zipf-distributed random values (thanks William Josephson)
+syscall: correct error return bug on 32-bit machines (thanks Christopher Wedgwood)
+syslog: new package for writing to Unix syslog daemon (thanks Yves Junqueira)
+template: will automatically invoke niladic methods
+time: new ISO8601 format generator (thanks Ben Olive)
+xgb: converted generator to new syntax (thanks Tor Andersson)
+xml: better mapping of tag names to Go identifiers (thanks Kei Son),
+ better handling of unexpected EOF (thanks Arvindh Rajesh Tamilmani)
+</pre>
+
+<h2 id="2009-12-09">2009-12-09</h2>
+
+<pre>
+Since the last release there are two changes to the language:
+
+* new builtin copy(dst, src) copies n = min(len(dst), len(src))
+ elements to dst from src and returns n. It works correctly
+ even if dst and src overlap. bytes.Copy is gone.
+ Convert your programs using:
+ gofmt -w -r 'bytes.Copy(d, s) -> copy(d, s)' *.go
+
+* new syntax x[lo:] is shorthand for x[lo:len(x)].
+ Convert your programs using:
+ gofmt -w -r 'a[b:len(a)] -> a[b:]' *.go
+
+In addition, there have been many smaller fixes and updates:
+
+* 6g/8g/5g: many bug fixes
+* 8g: fix 386 floating point stack bug (thanks Charles Dorian)
+* all.bash: now works even when $GOROOT has spaces (thanks Sergio Luis O. B. Correia),
+ starting to make build work with mingw (thanks Hector Chu),
+ FreeBSD support (thanks Devon O'Dell)
+* big: much faster on 386.
+* bytes: new function IndexByte, implemented in assembly
+ new function Runes (thanks Peter Froehlich),
+ performance tuning in bytes.Buffer.
+* codereview: various bugs fixed
+* container/vector: New is gone; just declare a Vector instead.
+ call Resize to set len and cap.
+* cgo: many bug fixes (thanks Eden Li)
+* crypto: added MD4 (thanks Chris Lennert),
+ added XTEA (thanks Adrian O'Grady).
+* crypto/tls: basic client
+* exp/iterable: new functions (thanks Michael Elkins)
+* exp/nacl: native client tree builds again
+* fmt: preliminary performance tuning
+* go/ast: more powerful Visitor (thanks Roger Peppe)
+* gob: a few bug fixes
+* gofmt: better handling of standard input, error reporting (thanks Fazlul Shahriar)
+ new -r flag for rewriting programs
+* gotest: support for Benchmark functions (thanks Trevor Strohman)
+* io: ReadFile, WriteFile, ReadDir now in separate package io/ioutil.
+* json: new Marshal function (thanks Michael Hoisie),
+ better white space handling (thanks Andrew Skiba),
+ decoding into native data structures (thanks Sergey Gromov),
+ handling of nil interface values (thanks Ross Light).
+* math: correct handling of sin/cos of large angles
+* net: better handling of Close (thanks Devon O'Dell and Christopher Wedgwood)
+ support for UDP broadcast (thanks Jonathan Wills),
+ support for empty packets
+* rand: top-level functions now safe to call from multiple goroutines
+(thanks Roger Peppe).
+* regexp: a few easy optimizations
+* rpc: better error handling, a few bug fixes
+* runtime: better signal handling on OS X, malloc fixes,
+ global channel lock is gone.
+* sync: RWMutex now allows concurrent readers (thanks Péter Szabó)
+* template: can use maps as data (thanks James Meneghello)
+* unicode: updated to Unicode 5.2.
+* websocket: new package (thanks Fumitoshi Ukai)
+* xgb: preliminary X Go Bindings (thanks Tor Andersson)
+* xml: fixed crash (thanks Vish Subramanian)
+* misc: bbedit config (thanks Anthony Starks),
+ kate config (thanks Evan Shaw)
+</pre>