go runtime_error ai_generated true

panic：关闭已关闭的 channel

panic: close of closed channel

ID: go/panic-close-of-closed-channel

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80%修复率
90%置信度
0证据数
2024-04-02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

close(ch) 被调用多次，通常来自多条清理路径或多个 defer 关闭。

English

close(ch) invoked more than once, often from multiple cleanup paths or deferred closes.

generic

解决方案

  1. 95% 成功率 
    var once sync.Once
once.Do(func() { close(ch) })
  2. 93% 成功率 
    go func() {
    defer close(ch)
    for v := range src { ch <- v }
}()

无效尝试

常见但无效的做法:

  1. 70% 失败

    Silently swallows a logic bug; downstream consumers may still observe inconsistent state.

  2. 95% 失败

    Multiple goroutines closing the same channel guarantees the panic.