// errorcheck // Copyright 2011 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 1556 package foo type I interface { m() int } type T int var _ I = T(0) // GCCGO_ERROR "incompatible" func (T) m(buf []byte) (a int, b xxxx) { // ERROR "xxxx" return 0, nil }