go runtime_error ai_generated true

panic: runtime error: invalid memory address or nil pointer dereference (in goroutine)

ID: go/panic-runtime-error-invalid-memory-address-nil-pointer-in-goroutine

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-09-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.0+ active — — —

Root Cause

A goroutine dereferences a nil pointer; because it runs in a background goroutine, the panic crashes the whole program.

generic

中文

某个 goroutine 解引用 nil 指针；由于运行在后台 goroutine 中，panic 会导致整个程序崩溃。

Workarounds

  1. 90% success 
    go func() {
    defer func() {
        if r := recover(); r != nil {
            log.Printf("panic: %v", r)
        }
    }()
    doWork()
}()
  2. 93% success 
    if p == nil {
    return fmt.Errorf("nil receiver")
}

Dead Ends

Common approaches that don't work:

  1. 95% fail

    Panic happens in a child goroutine; recover in main never sees it.

  2. 90% fail

    Any unhandled panic in a goroutine terminates the process.