1// compile
2
3// Copyright 2012 The Go Authors.  All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7// Used to crash compiler in interface type equality check.
8
9package p
10
11type I1 interface {
12      F() interface{I1}
13}
14
15type I2 interface {
16      F() interface{I2}
17}
18
19var v1 I1
20var v2 I2
21
22func f() bool {
23       return v1 == v2
24}
25