go issue8139 源码
golang issue8139 代码
文件路径：/test/fixedbugs/issue8139.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)
}
}
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