go runtime_error ai_generated true

panic：sync：WaitGroup 计数器为负数

panic: sync: negative WaitGroup counter

ID: go/panic-sync-negative-waitgroup-counter

其他格式: JSON · Markdown 中文 · English
80%修复率
90%置信度
0证据数
2024-02-03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

wg.Done() 调用次数多于 wg.Add()，通常是重复减计数或循环中 Done 未匹配 Add。

English

wg.Done() called more times than wg.Add(), typically from double-decrement or Done in a loop without matching Add.

generic

解决方案

  1. 95% 成功率 
    wg.Add(1)
go func() {
    defer wg.Done()
    work()
}()
  2. 92% 成功率 
    g, ctx := errgroup.WithContext(context.Background())
g.Go(func() error { return work(ctx) })
return g.Wait()

无效尝试

常见但无效的做法:

  1. 80% 失败

    Panic is thrown inside sync.WaitGroup internal state; recover in the goroutine may catch it but leaves the counter corrupted.

  2. 85% 失败

    Masks the bug; wg.Wait() then blocks forever because counter never reaches zero.