go
runtime_error
ai_generated
true
致命错误:并发写入 map
fatal error: concurrent map writes
ID: go/panic-concurrent-map-write
80%修复率
90%置信度
0证据数
2024-05-20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 在无同步的情况下同时修改同一个 map,运行时检测到竞态并中止。
English
Two goroutines mutate the same map without synchronization; the runtime detects the race and aborts.
解决方案
-
90% 成功率
var m sync.Map m.Store("k", 1) v, _ := m.Load("k") -
95% 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:
-
85% 失败
Narrows the race window but does not eliminate it; still fatal under load.
-
80% 失败
atomic.Value requires whole-value replacement; concurrent in-place writes still race.