go runtime_error ai_generated true

致命错误：所有 goroutine 处于休眠状态 - 死锁！ goroutine 1 [sync.Mutex.Lock]：

fatal error: all goroutines are asleep - deadlock! goroutine 1 [sync.Mutex.Lock]:

ID: go/deadlock-mutex-double-lock

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80%修复率

90%置信度

0证据数

2024-02-27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

一个 goroutine 在未解锁的情况下两次锁定同一个 sync.Mutex，或两个 goroutine 以相反顺序获取两个互斥锁。运行时检测到完全停止。

English

A goroutine locks a sync.Mutex twice without unlocking in between, or two goroutines acquire two mutexes in opposite order. The runtime detects a full stop.

generic

解决方案

96% 成功率

func (s *Service) Do() {
    s.mu.Lock()
    defer s.mu.Unlock()
    // ...
}

93% 成功率

// Always lock A before B
func transfer(a, b *Account) {
    if a.id < b.id { a.mu.Lock(); b.mu.Lock() } else { b.mu.Lock(); a.mu.Lock() }
    defer a.mu.Unlock(); defer b.mu.Unlock()
}

无效尝试

常见但无效的做法:

90% 失败
sync.Mutex has no timeout API; you must restructure the code or use a channel-based lock.
95% 失败
All runnable goroutines are blocked on the mutex; more Ps do not help.