go runtime_error ai_generated true

WARNING: DATA RACE 写操作 0x00c000... 由 goroutine 7 执行 先前的写操作 0x00c000... 由 goroutine 8 执行

WARNING: DATA RACE Write at 0x00c000... by goroutine 7 Previous write at 0x00c000... by goroutine 8

ID: go/race-detector-write-write

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80%修复率
90%置信度
0证据数
2024-04-02首次发现

版本兼容性

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

根因分析

两个 goroutine 在没有同步的情况下访问同一内存位置，且至少有一次写操作，在 -race 模式下被竞态检测器捕获。

English

Two goroutines access the same memory location without synchronization, with at least one write, detected by the race detector when running with -race.

generic

解决方案

  1. 95% 成功率 
    var mu sync.Mutex
mu.Lock()
counter++
mu.Unlock()
// or
atomic.AddInt64(&counter, 1)
  2. 92% 成功率 
    results := make(chan int, len(items))
for _, it := range items {
    it := it
    go func(v int) { results <- compute(v) }(it)
}

无效尝试

常见但无效的做法:

  1. 95% 失败

    The race is real; disabling detection does not fix corruption, which surfaces later as random crashes.

  2. 90% 失败

    Sleep reduces the window but does not eliminate the race; the detector still reports it.