go runtime_error ai_generated true

警告：数据竞争：协程X写入，协程Y读取（闭包变量）

WARNING: DATA RACE: Write by goroutine X, Read by goroutine Y (closure variable)

ID: go/goroutine-race-on-closure-variable

其他格式: JSON · Markdown 中文 · English
80%修复率
90%置信度
0证据数
2025-01-15首次发现

版本兼容性

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

根因分析

协程闭包通过引用捕获循环变量，导致多个协程竞争同一个变量。

English

Goroutine closures capture loop variables by reference, causing multiple goroutines to race on the same variable.

generic

解决方案

  1. 99% 成功率 Pass loop variable as argument to goroutine 
    for i := 0; i < 10; i++ {
    go func(val int) {
        fmt.Println(val)
    }(i)
}
  2. 98% 成功率 Create local copy within loop 
    for i := 0; i < 10; i++ {
    val := i
    go func() {
        fmt.Println(val)
    }()
}

无效尝试

常见但无效的做法:

  1. Adding time.Sleep in loop to stagger goroutines 90% 失败

    Race condition still exists; timing-dependent fix unreliable.

  2. Using global variable instead of local 80% 失败

    Global variable is shared; race condition worsens.