go runtime_error ai_generated true

致命错误：所有 goroutine 都在休眠 - 死锁！（循环等待）

fatal error: all goroutines are asleep - deadlock! (circular wait)

ID: go/deadlock-with-multiple-channels

其他格式: JSON · Markdown 中文 · English
80%修复率
82%置信度
0证据数
2024-09-01首次发现

版本兼容性

版本状态引入弃用备注
1.20 active — — —
1.21 active — — —

根因分析

多个 goroutine 在相互等待对方的通道，形成无法解决的循环依赖。

English

Multiple goroutines are waiting on each other's channels, forming a circular dependency that cannot be resolved.

generic

解决方案

  1. 85% 成功率 
    select {
case v := <-ch1:
    fmt.Println(v)
case <-time.After(time.Second):
    fmt.Println("timeout")
}
  2. 90% 成功率 
    type Coordinator struct {
    ch chan int
}

func (c *Coordinator) Run() {
    for v := range c.ch {
        go func(v int) {
            // process
        }(v)
    }
}

无效尝试

常见但无效的做法:

  1. 80% 失败

    Buffering only delays the deadlock; it doesn't break the circular wait.

  2. 90% 失败

    Sleeping doesn't guarantee the order; the race condition remains.