go resource_error ai_generated true

warning: channel leak detected (chan int, goroutine 3)

ID: go/channel-leak-without-close

Also available as: JSON · Markdown · 中文
80%Fix Rate
80%Confidence
0Evidence
2024-08-02First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.21 active — — —

Root Cause

A channel is never closed and no goroutine is sending or receiving, causing it to be held forever.

generic

中文

通道从未关闭，且没有 goroutine 发送或接收，导致其永远被持有。

Workarounds

  1. 90% success 
    ch := make(chan int)
// Ensure it's closed eventually
defer close(ch)
// or use a worker that exits
  2. 85% success 
    ctx, cancel := context.WithCancel(context.Background())
ch := make(chan int)
go func() {
    select {
    case <-ctx.Done():
        close(ch)
    case v := <-ch:
        // process
    }
}()
cancel()

Dead Ends

Common approaches that don't work:

  1. 100% fail

    Channels are not garbage collected if referenced; GC doesn't force close.

  2. 90% fail

    Nil channel blocks forever; doesn't release resources.

  3. 80% fail

    Leaks accumulate, leading to memory exhaustion.