go
runtime_error
ai_generated
true
fatal error: 所有 goroutine 都处于休眠状态 - 死锁!(wg.Wait 在 goroutine 启动前返回)
fatal error: all goroutines are asleep - deadlock! (wg.Wait returns before goroutines start)
ID: go/waitgroup-add-inside-goroutine-race
80%修复率
88%置信度
0证据数
2024-03-08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 | — | — | — |
根因分析
wg.Add(1) 在 goroutine 内部调用而不是之前,导致 Wait() 可能提前返回或永久阻塞,取决于时序。
English
wg.Add(1) is called inside the goroutine rather than before it, so Wait() can return early or block forever depending on timing.
解决方案
-
98% 成功率
wg.Add(1) go func() { defer wg.Done() work() }() wg.Wait() -
90% 成功率
done := make(chan struct{}, n) for i := 0; i < n; i++ { go func() { work(); done <- struct{}{} }() } for i := 0; i < n; i++ { <-done }
无效尝试
常见但无效的做法:
-
80% 失败
Sleeping only hides the race; under load the goroutine may still not have run Add in time.
-
75% 失败
Serialization does not guarantee the goroutine has executed Add before Wait checks the counter.