bug183 - embedded vs non-embedded struct field in eqtype

R=ken
OCL=32888
CL=32888

src/cmd/gc/subr.c

@@ -1537,6 +1537,8 @@ eqtype1(Type *t1, Type *t2, int d, int names)
 				return 0;
 			if(t1 == T)
 				return 1;
+			if(t1->embedded != t2->embedded)
+				return 0;
 			if(t1->nname != N && t1->nname->sym != S) {
 				if(t2->nname == N || t2->nname->sym == S)
 					return 0;

test/fixedbugs/bug183.go

+//errchk $G $D/$F.go
+
+// Copyright 2009 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 main
+
+type T int
+
+func f() {
+	var x struct { T };
+	var y struct { T T };
+	x = y	// ERROR "cannot"
+}
+
+type T1 struct { T }
+type T2 struct { T T }
+
+func g() {
+	var x T1;
+	var y T2;
+	x = y	// ERROR "cannot"
+}
+