go runtime_error ai_generated true

fatal error: 并发写 map

fatal error: concurrent map writes

ID: go/concurrent-map-write

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80%修复率
92%置信度
0证据数
2024-05-08首次发现

版本兼容性

版本状态引入弃用备注
1.0+ active — — —

根因分析

两个 goroutine 在无同步的情况下写同一个 map。运行时检测到并发写 map 会直接终止进程，无法 recover。

English

Two goroutines wrote to the same map without synchronization. The runtime detects concurrent map writes and aborts the process; it is not recoverable.

generic

解决方案

  1. 97% 成功率 
    var mu sync.RWMutex
mu.Lock()
m[k] = v
mu.Unlock()

mu.RLock()
v := m[k]
mu.RUnlock()
  2. 90% 成功率 
    var m sync.Map
m.Store(k, v)
if v, ok := m.Load(k); ok { _ = v }

无效尝试

常见但无效的做法:

  1. 99% 失败

    fatal error is not a panic; recover cannot intercept it. The process dies regardless.

  2. 60% 失败

    If reads also race with writes, the runtime may still report concurrent map read and map write. Both paths need protection.