golang bug021 代码
文件路径：/test/fixedbugs/bug021.go
/ run
/ Copyright 2009 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.
package main
func main() {
s1 := "hi";
s2 := "ho";
s1 += s2;
}