mirror of
https://github.com/golang/go
synced 2024-11-06 11:36:16 -07:00
39 lines
563 B
Go
39 lines
563 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.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"runtime"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Func func()
|
||
|
|
|
||
|
|
func (f Func) Foo() {
|
||
|
|
if f != nil {
|
||
|
|
f()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f Func) Bar() {
|
||
|
|
if f != nil {
|
||
|
|
f()
|
||
|
|
}
|
||
|
|
buf := make([]byte, 4000)
|
||
|
|
n := runtime.Stack(buf, true)
|
||
|
|
s := string(buf[:n])
|
||
|
|
if strings.Contains(s, "-fm") {
|
||
|
|
panic("wrapper present in stack trace:\n" + s)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
foo := Func(func() {})
|
||
|
|
foo = foo.Bar
|
||
|
|
foo.Foo()
|
||
|
|
}
|