cmd/compile: emit definition of 'any' when compiling runtime

Include the predefined type 'any' in the list of other important
predefined types that are emitted when compiling the runtime package
(uintptr, string, etc).

Fixes #49619.

Change-Id: I4a851ba2f302fbc3a425e65daa325c6bf83659da
Reviewed-on: https://go-review.googlesource.com/c/go/+/364377
Trust: Than McIntosh <thanm@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>

diff --git a/src/cmd/compile/internal/reflectdata/reflect.go b/src/cmd/compile/internal/reflectdata/reflect.go
index 4e20dbf29ea8cc9e0b3dabd3739c429f19938972..e22fabb4108a81d9ad32b84bdae0a7dfcf0d6868 100644 (file)
--- a/src/cmd/compile/internal/reflectdata/reflect.go
+++ b/src/cmd/compile/internal/reflectdata/reflect.go
@@ -1384,6 +1384,7 @@ func WriteBasicTypes() {
                }
                writeType(types.NewPtr(types.Types[types.TSTRING]))
                writeType(types.NewPtr(types.Types[types.TUNSAFEPTR]))
+               writeType(types.AnyType)
 
                // emit type structs for error and func(error) string.
                // The latter is the type of an auto-generated wrapper.

diff --git a/test/fixedbugs/issue49619.go b/test/fixedbugs/issue49619.go
new file mode 100644 (file)
index 0000000..c9f3cbc
--- /dev/null
+++ b/test/fixedbugs/issue49619.go
@@ -0,0 +1,19 @@
+// build
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This testcase caused a linker crash in DWARF generation.
+
+package main
+
+//go:noinline
+func f() any {
+       var a []any
+       return a[0]
+}
+
+func main() {
+       f()
+}