go runtime_error ai_generated true

panic: 关闭 nil channel

panic: close of nil channel

ID: go/channel-close-nil-channel

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80%修复率
90%置信度
0证据数
2024-06-01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

试图关闭一个未初始化的 channel（nil）。

English

Attempting to close a channel that has not been initialized (nil).

generic

解决方案

  1. 98% 成功率 
    ch := make(chan int)
// later
close(ch)
  2. 90% 成功率 
    var once sync.Once
closeCh := func() {
    if ch != nil {
        once.Do(func() { close(ch) })
    }
}

无效尝试

常见但无效的做法:

  1. 80% 失败

    If the channel is nil, closing it is still a panic; you must avoid the close entirely

  2. 70% 失败

    Recovering hides the bug and may leave resources in inconsistent state