go/test/fixedbugs/bug494.go
Ian Lance Taylor 6cd4d59db6 test: add bug494: test case miscompiled by gccgo
Gccgo incorrectly executed functions multiple times when they appeared
in a composite literal that required a conversion between different
interface types.

Change-Id: I7b40e76ed23fa8440ffa03b262041265c109adf7
Reviewed-on: https://go-review.googlesource.com/1710
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
2014-12-18 02:45:00 +00:00

52 lines
695 B
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)
}
}