go bug148 源码
golang bug148 代码
文件路径：/test/fixedbugs/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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