| // Copyright 2013 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. | |
| // +build !appengine | |
| // This program demonstrates a race condition. | |
| // To observe the race with the race detector, build with -race. | |
| package main | |
| import "fmt" | |
| func main() { | |
| done := make(chan bool) | |
| m := make(map[string]string) | |
| m["name"] = "world" | |
| go func() { | |
| m["name"] = "data race" | |
| done <- true | |
| }() | |
| fmt.Println("Hello,", m["name"]) | |
| <-done | |
| } |