go defernil 源码
golang defernil 代码
文件路径：/test/defernil.go
// run
// Copyright 2019 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 deferring a nil function causes a proper
// panic when the deferred function is invoked (not
// when the function is deferred).
// See Issue #8047 and #34926.
package main
var x = 0
func main() {
defer func() {
err := recover()
if err == nil {
panic("did not panic")
}
if x != 1 {
panic("FAIL")
}
}()
f()
}
func f() {
var nilf func()
defer nilf()
x = 1
}
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