go bug099 源码
golang bug099 代码
文件路径：/test/fixedbugs/bug099.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
// Interface
type I interface { F() int }
// Implements interface
type S struct { }
func (s *S) F() int { return 1 }
// Allocates S but returns I
// Arg is unused but important:
// if you take it out (and the 0s below)
// then the bug goes away.
func NewI(i int) I {
return new(S)
}
// Uses interface method.
func Use(x I) {
x.F()
}
func main() {
i := NewI(0);
Use(i);
// Again, without temporary
// Crashes because x.F is 0.
Use(NewI(0));
}
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