cmd/gc: fix method values whose receiver is an unnamed interface.
Fixes #6140.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/13083043
diff --git a/test/fixedbugs/issue6140.go b/test/fixedbugs/issue6140.go
new file mode 100644
index 0000000..d494933
--- /dev/null
+++ b/test/fixedbugs/issue6140.go
@@ -0,0 +1,31 @@
+// compile
+
+// Copyright 2013 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.
+
+// Issue 6140: compiler incorrectly rejects method values
+// whose receiver has an unnamed interface type.
+
+package p
+
+type T *interface {
+ m() int
+}
+
+var x T
+
+var _ = (*x).m
+
+var y interface {
+ m() int
+}
+
+var _ = y.m
+
+type I interface {
+ String() string
+}
+
+var z *struct{ I }
+var _ = z.String
