go runtime_error ai_generated true

panic: sync: unlock of unlocked mutex

ID: go/panic-sync-unlock-of-unlocked-mutex

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-01-30First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.18 active — — —
1.21 active — — —

Root Cause

sync.Mutex.Unlock() is called on a mutex that is not currently locked, often due to double Unlock or a missing Lock.

generic

中文

对当前未锁定的互斥锁调用 sync.Mutex.Unlock()，通常是由于重复 Unlock 或缺少 Lock。

Workarounds

  1. 95% success 
    Use defer mu.Unlock() immediately after Lock() to ensure pairing:
mu.Lock()
defer mu.Unlock()
  2. 85% success 
    Review all Lock/Unlock pairs and ensure they are balanced. Consider using sync.RWMutex if read-heavy.

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Hides the bug but does not fix the incorrect locking logic; may cause deadlocks later.

  2. 60% fail

    Channels have different semantics and may not fit the use case; also more complex.