golang bug494 代码
文件路径：/test/fixedbugs/bug494.go
/ run
/ Copyright 2014 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.
/ Gccgo incorrectly executed functions multiple times when they
/ appeared in a composite literal that required a conversion between
/ different interface types.
package main
type MyInt int
var c MyInt
func (c *MyInt) S(i int) {
*c = MyInt(i)
}
func (c *MyInt) V() int {
return int(*c)
}
type i1 interface {
S(int)
V() int
}
type i2 interface {
V() int
}
type s struct {
i i2
}
func f() i1 {
c++
return &c
}
func main() {
p := &s{f()}
if v := p.i.V(); v != 1 {
panic(v)
}
if c != 1 {
panic(c)
}
}