go data_error ai_generated true

error: 从已关闭 channel 无限读取零值

error: infinite loop reading zero values from closed channel

ID: go/receive-from-closed-channel-loop

其他格式: JSON · Markdown 中文 · English

80%修复率

86%置信度

0证据数

2024-06-08首次发现

版本兼容性

版本	状态	引入	弃用	备注
1.x	active	—	—	—

根因分析

期望 for v := range ch 终止,但写成 for { v := <-ch } 的循环在 channel 关闭后会永远返回零值,因为从已关闭 channel 接收永不阻塞。

English

A for v := range ch loop is expected to terminate, but a for { v := <-ch } loop keeps returning zero values forever after close because receives from a closed channel never block.

generic

解决方案

97% 成功率

for {
    v, ok := <-ch
    if !ok {
        return
    }
    process(v)
}

98% 成功率
```
for v := range ch {
    process(v)
}
```

无效尝试

常见但无效的做法:

85% 失败
Does not stop the loop; still processes infinite zero values and corrupts data.
75% 失败
Zero is a legitimate value; breaks on real data and still races with close.