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));
}