golang closure4 代码
文件路径：/test/closure4.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.
/ Check that calling a nil func causes a proper panic.
package main
func main() {
defer func() {
err := recover()
if err == nil {
panic("panic expected")
}
}()
var f func()
f()
}