golang issue13684 代码
文件路径：/test/fixedbugs/issue13684.go
/ run
/ Copyright 2015 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.
/ Verify that a label name matching a constant name
/ is permitted.
package main
const labelname = 1
func main() {
goto labelname
labelname:
}