go runtime_error ai_generated true

fatal error: 所有 goroutine 都处于休眠状态 - 死锁！（WaitGroup 被复制）

fatal error: all goroutines are asleep - deadlock! (WaitGroup copied)

ID: go/waitgroup-passed-by-value

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80%修复率
88%置信度
0证据数
2024-08-02首次发现

版本兼容性

版本状态引入弃用备注
1.14+ active — — —

根因分析

sync.WaitGroup 按值传递给函数，导致 Add/Done 作用于副本，原对象的 Wait() 永远无法解除阻塞。

English

A sync.WaitGroup is passed by value to a function, so Add/Done operate on a copy and Wait() on the original never unblocks.

generic

解决方案

  1. 95% 成功率 
    func worker(wg *sync.WaitGroup) {
    defer wg.Done()
    // ...
}
  2. 92% 成功率 
    type Pool struct { wg sync.WaitGroup }
func (p *Pool) Run() { p.wg.Add(1); go func(){ defer p.wg.Done() }() }

无效尝试

常见但无效的做法:

  1. 80% 失败

    The copy bug remains; the timeout just papers over the deadlock without fixing counter propagation.

  2. 85% 失败

    The counters are in different copies; adding to the original still does not match the copy's Done calls.