mirror of
https://github.com/golang/go
synced 2024-11-25 14:27:57 -07:00
40 lines
567 B
Go
40 lines
567 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2018 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.
|
||
|
|
|
||
|
|
// Issue 26248: gccgo miscompiles interface field expression.
|
||
|
|
// In G().M where G returns an interface, G() is evaluated twice.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
type I interface {
|
||
|
|
M()
|
||
|
|
}
|
||
|
|
|
||
|
|
type T struct{}
|
||
|
|
|
||
|
|
func (T) M() {}
|
||
|
|
|
||
|
|
var g = 0
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func G() I {
|
||
|
|
g++
|
||
|
|
return T{}
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func Use(interface{}) {}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
x := G().M
|
||
|
|
Use(x)
|
||
|
|
|
||
|
|
if g != 1 {
|
||
|
|
println("want 1, got", g)
|
||
|
|
panic("FAIL")
|
||
|
|
}
|
||
|
|
}
|