golang bug450 代码
文件路径：/test/fixedbugs/bug450.go
/ run
/ Copyright 2012 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.
/ Issue 3899: 8g incorrectly thinks a variable is
/ "set but not used" and elides an assignment, causing
/ variables to end up with wrong data.
/
/ The reason is a miscalculation of variable width.
package main
func bar(f func()) {
f()
}
func foo() {
f := func() {}
if f == nil {
}
bar(f)
}
func main() {
foo()
}