# 致命错误：sync：解锁未加锁的 mutex

- **ID:** `go/mutex-unlock-of-unlocked-mutex`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

对一个当前未加锁的 sync.Mutex 调用 Unlock()，通常是在未执行 Lock 的错误路径上执行了 defer Unlock。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 1.18 | active | — | — |
| 1.20 | active | — | — |
| 1.22 | active | — | — |

## 解决方案

1. **** (95% 成功率)
   ```
   mu.Lock()
defer mu.Unlock()
// critical section
   ```
2. **** (88% 成功率)
   ```
   func lock(mu *sync.Mutex) func() {
    mu.Lock()
    return mu.Unlock
}
unlock := lock(&mu)
defer unlock()
   ```

## 无效尝试

- **** — The mutex state is inconsistent; subsequent Lock calls may deadlock or panic unpredictably. (75% 失败率)
- **** — RWMutex has the same Unlock semantics, so the bug persists. (70% 失败率)