mirror of
https://github.com/golang/go
synced 2024-11-18 06:14:46 -07:00
51 lines
801 B
Go
51 lines
801 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.
|
||
|
|
|
||
|
|
// Issue 8139. The x.(T) assertions used to write 1 (unexpected)
|
||
|
|
// return byte for the 0-byte return value T.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
type T struct{}
|
||
|
|
|
||
|
|
func (T) M() {}
|
||
|
|
|
||
|
|
type M interface {
|
||
|
|
M()
|
||
|
|
}
|
||
|
|
|
||
|
|
var e interface{} = T{}
|
||
|
|
var i M = T{}
|
||
|
|
var b bool
|
||
|
|
|
||
|
|
func f1() int {
|
||
|
|
if b {
|
||
|
|
return f1() // convince inliner not to inline
|
||
|
|
}
|
||
|
|
z := 0x11223344
|
||
|
|
_ = e.(T)
|
||
|
|
return z
|
||
|
|
}
|
||
|
|
|
||
|
|
func f2() int {
|
||
|
|
if b {
|
||
|
|
return f1() // convince inliner not to inline
|
||
|
|
}
|
||
|
|
z := 0x11223344
|
||
|
|
_ = i.(T)
|
||
|
|
return z
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
x := f1()
|
||
|
|
y := f2()
|
||
|
|
if x != 0x11223344 || y != 0x11223344 {
|
||
|
|
fmt.Printf("BUG: x=%#x y=%#x, want 0x11223344 for both\n", x, y)
|
||
|
|
}
|
||
|
|
}
|