go runtime_error ai_generated true

fatal error: 并发写入 map

fatal error: concurrent map writes

ID: go/map-concurrent-write

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80%修复率
90%置信度
0证据数
2024-04-18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

多个 goroutine 在无同步的情况下写入同一个 map，运行时检测到重叠写入并中止程序。

English

Two or more goroutines write to the same map without synchronization. The runtime detects overlapping writes and aborts the program.

generic

解决方案

  1. 94% 成功率 
    var mu sync.RWMutex
mu.Lock()
m[key] = value
mu.Unlock()
  2. 90% 成功率 
    var m sync.Map
m.Store(key, value)
v, ok := m.Load(key)

无效尝试

常见但无效的做法:

  1. 80% 失败

    The runtime detector may still fire and the race is not eliminated, only made less frequent.

  2. 70% 失败

    Atomic values do not protect the map's internal buckets; the map itself is still raced.