From: Robert Griesemer <gri@golang.org>
Date: Mon, 3 Oct 2016 20:32:11 +0000 (-0700)
Subject: go/types: minimal support for alias declarations: don't crash
X-Git-Tag: go1.8beta1~1037
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=316f93f7164d015ce82f341bd58657cc84f2cc69;p=gostls13.git

go/types: minimal support for alias declarations: don't crash

For #16339

Change-Id: I8927f40e0fd166795f41c784ad92449743f73af5
Reviewed-on: https://go-review.googlesource.com/30213
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
---

diff --git a/src/go/types/check_test.go b/src/go/types/check_test.go
index 5a3032282f..d823344066 100644
--- a/src/go/types/check_test.go
+++ b/src/go/types/check_test.go
@@ -72,6 +72,7 @@ var tests = [][]string{
 	{"testdata/const1.src"},
 	{"testdata/constdecl.src"},
 	{"testdata/vardecl.src"},
+	{"testdata/aliasdecl.src"},
 	{"testdata/expr0.src"},
 	{"testdata/expr1.src"},
 	{"testdata/expr2.src"},
diff --git a/src/go/types/resolver.go b/src/go/types/resolver.go
index 2b81b4a84b..15722dec8d 100644
--- a/src/go/types/resolver.go
+++ b/src/go/types/resolver.go
@@ -274,6 +274,9 @@ func (check *Checker) collectObjects() {
 							check.declare(fileScope, nil, obj, token.NoPos)
 						}
 
+					case *ast.AliasSpec:
+						check.errorf(s.Name.Pos(), "cannot handle alias declarations yet")
+
 					case *ast.ValueSpec:
 						switch d.Tok {
 						case token.CONST:
diff --git a/src/go/types/testdata/aliasdecl.src b/src/go/types/testdata/aliasdecl.src
new file mode 100644
index 0000000000..d1153516f2
--- /dev/null
+++ b/src/go/types/testdata/aliasdecl.src
@@ -0,0 +1,10 @@
+// Copyright 2016 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.
+
+package aliasdecl
+
+import "math"
+
+const _ = math.Pi
+const c /* ERROR "cannot handle alias declarations yet" */ => math.Pi