| // 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() | |
| } |