| // 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() |
| } |
