go runtime_error ai_generated true

致命错误：并发map写操作

fatal error: concurrent map writes

ID: go/goroutine-map-concurrent-write

其他格式: JSON · Markdown 中文 · English
80%修复率
89%置信度
0证据数
2024-11-01首次发现

版本兼容性

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

根因分析

多个协程在没有同步的情况下写入Go map，导致运行时崩溃。

English

Multiple goroutines write to a Go map without synchronization, causing a runtime crash.

generic

解决方案

  1. 98% 成功率 Use sync.Mutex to protect all map access 
    var mu sync.Mutex
m := make(map[string]int)
// write
mu.Lock()
m["key"] = 1
mu.Unlock()
// read
mu.Lock()
val := m["key"]
mu.Unlock()
  2. 90% 成功率 Use sync.Map for concurrent-safe map operations 
    var m sync.Map
m.Store("key", 1)
val, ok := m.Load("key")

无效尝试

常见但无效的做法:

  1. Using a mutex only for writes but not reads 80% 失败

    Concurrent reads during writes can also cause race conditions.

  2. Using a sync.Map incorrectly 65% 失败

    sync.Map has specific use cases; misuse can still cause races.