go runtime_error ai_generated true

panic: sync: RUnlock of unlocked RWMutex

ID: go/rwmutex-read-lock-recursive

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80%Fix Rate
86%Confidence
0Evidence
2024-09-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.19 active — — —

Root Cause

Calling RUnlock without a matching RLock, often due to recursive read locking.

generic

中文

在没有相应RLock的情况下调用RUnlock，通常是由于递归读锁定。

Workarounds

  1. 99% success 
    mu.RLock(); defer mu.RUnlock()
  2. 95% success 
    Restructure code to hold lock only once per goroutine.

Dead Ends

Common approaches that don't work:

  1. 85% fail

    RLock is not reentrant; multiple RLock without unlock causes deadlock or panic.

  2. 90% fail

    Attempting to upgrade read lock to write lock causes deadlock.