go runtime_error ai_generated true

致命错误：并发映射写入

fatal error: concurrent map writes

ID: go/race-condition-shared-map

其他格式: JSON · Markdown 中文 · English
80%修复率
88%置信度
0证据数
2024-02-10首次发现

版本兼容性

版本状态引入弃用备注
1.21 active — — —

根因分析

多个 goroutine 在没有同步的情况下写入同一个映射会导致运行时崩溃。

English

Multiple goroutines writing to the same map without synchronization causes a runtime crash.

generic

解决方案

  1. 95% 成功率 
    var mu sync.RWMutex
m := make(map[string]int)
// Write
mu.Lock()
m["key"] = 1
mu.Unlock()
// Read
mu.RLock()
val := m["key"]
mu.RUnlock()
  2. 90% 成功率 
    var m sync.Map
m.Store("key", 1)
val, _ := m.Load("key")

无效尝试

常见但无效的做法:

  1. 90% 失败

    Concurrency issue is not about collisions; it's about data races.

  2. 70% 失败

    sync.Map is safe for concurrent writes, but if mixed with regular map, issue persists.

  3. 95% 失败

    Sleeps don't synchronize; race remains.