--- /dev/null
+// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG: bug286 failed
+
+// Copyright 2010 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.
+
+// Test case for issue 849.
+
+package main
+
+type I interface {
+ f()
+}
+
+
+var callee string
+var error bool
+
+type T int
+
+func (t *T) f() { callee = "f" }
+func (i *T) g() { callee = "g" }
+
+
+// test1 and test2 are the same except that in the interface J
+// the entries are swapped. test2 and test3 are the same except
+// that in test3 the interface J is declared outside the function.
+//
+// Error: test2 calls g instead of f
+
+func test1(x I) {
+ type J interface {
+ I
+ g()
+ }
+ x.(J).f()
+ if callee != "f" {
+ println("test1 called", callee)
+ error = true
+ }
+}
+
+
+func test2(x I) {
+ type J interface {
+ g()
+ I
+ }
+ x.(J).f()
+ if callee != "f" {
+ println("test2 called", callee)
+ error = true
+ }
+}
+
+
+type J interface {
+ g()
+ I
+}
+
+func test3(x I) {
+ x.(J).f()
+ if callee != "f" {
+ println("test3 called", callee)
+ error = true
+ }
+}
+
+func main() {
+ x := new(T)
+ test1(x)
+ test2(x)
+ test3(x)
+ if error {
+ panic("wrong method called")
+ }
+}
+
+/*
+6g bug286.go && 6l bug286.6 && 6.out
+test2 called g
+panic: wrong method called
+
+panic PC=0x24e040
+runtime.panic+0x7c /home/gri/go1/src/pkg/runtime/proc.c:1012
+ runtime.panic(0x0, 0x24e0a0)
+main.main+0xef /home/gri/go1/test/bugs/bug286.go:76
+ main.main()
+mainstart+0xf /home/gri/go1/src/pkg/runtime/amd64/asm.s:60
+ mainstart()
+goexit /home/gri/go1/src/pkg/runtime/proc.c:145
+ goexit()
+*/