// 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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package main
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type T struct {a, b int};
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func println(x, y int) { }
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func f(x interface{}) interface{} {
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type T struct {a, b int};
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if x == nil {
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return T{2, 3};
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}
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t := x.(T);
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println(t.a, t.b);
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return x;
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}
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func main() {
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inner_T := f(nil);
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f(inner_T);
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shouldPanic(p1)
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}
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func p1() {
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outer_T := T{5, 7};
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f(outer_T);
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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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/*
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This prints:
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2 3
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5 7
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but it should crash: The type assertion on line 18 should fail
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for the 2nd call to f with outer_T.
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*/
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