go runtime_error ai_generated true

致命错误:所有 goroutine 处于休眠状态 - 死锁! goroutine 1 [select (no cases)]:

fatal error: all goroutines are asleep - deadlock! goroutine 1 [select (no cases)]:

ID: go/select-no-case-ready-blocks-forever

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80%修复率
89%置信度
0证据数
2024-09-12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

select 语句没有就绪的 case 也没有 default,永久阻塞。如果它是唯一可运行的 goroutine,运行时会报告死锁。

English

A select statement has no ready cases and no default, blocking forever. If it's the only runnable goroutine, the runtime reports deadlock.

generic

解决方案

  1. 92% 成功率
    select {
    case v := <-ch:
        return v
    case <-time.After(5 * time.Second):
        return errors.New("timeout")
    }
  2. 95% 成功率
    select {
    case v := <-ch:
        return v, nil
    case <-ctx.Done():
        return nil, ctx.Err()
    }

无效尝试

常见但无效的做法:

  1. 85% 失败

    Turns a blocking wait into a busy loop that spins CPU at 100%.

  2. 80% 失败

    Polling with sleeps adds latency and still misses events under load.