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bug148.go
// run // Copyright 2009 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. package main type T struct {a, b int}; func println(x, y int) { } func f(x interface{}) interface{} { type T struct {a, b int}; if x == nil { return T{2, 3}; } t := x.(T); println(t.a, t.b); return x; } func main() { inner_T := f(nil); f(inner_T); shouldPanic(p1) } func p1() { outer_T := T{5, 7}; f(outer_T); } func shouldPanic(f func()) { defer func() { if recover() == nil { panic("function should panic") } }() f() } /* This prints: 2 3 5 7 but it should crash: The type assertion on line 18 should fail for the 2nd call to f with outer_T. */
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