mirror of
https://github.com/golang/go
synced 2024-11-23 03:20:03 -07:00
5f256dc8e6
The fix is CL 122756. Updates #26248. Change-Id: Ic4250ab5d01da9f65d0bc033e2306343d9c87a99 Reviewed-on: https://go-review.googlesource.com/122757 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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")
|
|
}
|
|
}
|