go runtime_error ai_generated true

fatal error：并发 map 写入

fatal error: concurrent map writes

ID: go/data-race-map-concurrent-write

其他格式: JSON · Markdown 中文 · English
80%修复率
89%置信度
0证据数
2024-04-03首次发现

版本兼容性

版本状态引入弃用备注
1.16 active — — —
1.21 active — — —
1.22 active — — —

根因分析

两个 goroutine 在无同步的情况下写入同一个 map。运行时检测到并发写并中止进程。

English

Two goroutines write to the same map without synchronization. The runtime detects concurrent writes and aborts the process.

generic

解决方案

  1. 92% 成功率 
    var m sync.Map
m.Store(k, v)
v, ok := m.Load(k)
  2. 96% 成功率 
    var mu sync.RWMutex
mu.Lock()
m[k] = v
mu.Unlock()

无效尝试

常见但无效的做法:

  1. 90% 失败

    Other writes still race; the runtime aborts on the first detected concurrent pair.

  2. 85% 失败

    Sleeps don't eliminate races under real load; the crash just becomes intermittent.