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f316a7ea87
Fixes #5691. R=golang-dev, bradfitz, daniel.morsing, rsc CC=golang-dev https://golang.org/cl/10255047
54 lines
666 B
Go
54 lines
666 B
Go
// run
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that interface conversion fails when method is missing.
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package main
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type I interface {
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Foo()
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}
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func main() {
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shouldPanic(p1)
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shouldPanic(p2)
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}
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func p1() {
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var s *S
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var i I
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var e interface{}
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e = s
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i = e.(I)
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_ = i
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}
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type S struct{}
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func (s *S) _() {}
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type B interface {
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_()
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}
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func p2() {
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var s *S
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var b B
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var e interface{}
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e = s
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b = e.(B)
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_ = b
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}
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func shouldPanic(f func()) {
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defer func() {
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if recover() == nil {
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panic("function should panic")
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}
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}()
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f()
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}
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