- duplicate struct field not diagnosed

R=rsc
DELTA=16  (16 added, 0 deleted, 0 changed)
OCL=23224
CL=23229

test/bugs/bug132.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 struct {
+	x, x int  // this should be a compile-time error
+}
+
+/*
+Accessing obj.x for obj of type T will lead to an error so this cannot
+be used in a program, but I would argue that this should be a compile-
+tume error at the declaration point.
+*/

test/golden.out

@@ -146,6 +146,9 @@ BUG: should run
 =========== bugs/bug131.go
 BUG: should not compile
 
+=========== bugs/bug132.go
+BUG: compilation succeeds incorrectly
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: overflow converting constant to uint