// run
// Copyright 2010 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() {
data := make(map[int]string, 1)
data[0] = "hello, "
data[0] += "world!"
if data[0] != "hello, world!" {
panic("BUG: " + data[0])
}
}