go issue16760 源码
golang issue16760 代码
文件路径：/test/fixedbugs/issue16760.go
// run
// Copyright 2016 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.
// Make sure we don't start marshaling (writing to the stack)
// arguments until those arguments are evaluated and known
// not to unconditionally panic. If they unconditionally panic,
// we write some args but never do the call. That messes up
// the logic which decides how big the argout section needs to be.
package main
type W interface {
Write([]byte)
}
type F func(W)
func foo(f F) {
defer func() {
if r := recover(); r != nil {
usestack(1000)
}
}()
f(nil)
}
func main() {
foo(func(w W) {
var x []string
w.Write([]byte(x[5]))
})
}
func usestack(n int) {
if n == 0 {
return
}
usestack(n - 1)
}
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