# 恐慌：同步：对未锁定的互斥锁解锁

- **ID:** `go/mutex-unlock-not-locked`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

在当前协程未锁定的 sync.Mutex 上调用 Unlock，通常由于缺少 Lock 或重复 Unlock。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 1.20 | active | — | — |
| 1.21 | active | — | — |
| 1.22 | active | — | — |

## 解决方案

1. **Always pair Lock with defer Unlock immediately** (99% 成功率)
   ```
   mu.Lock(); defer mu.Unlock(); // critical section
   ```
2. **Use sync.RWMutex with proper RLock/RUnlock pairing** (98% 成功率)
   ```
   mu.RLock(); defer mu.RUnlock(); // read section
   ```

## 无效尝试

- **Adding defer mu.Unlock() without ensuring Lock is called** — If Lock panics, Unlock still called on unlocked mutex. (70% 失败率)
- **Using recover to catch panic and continue** — Does not fix root cause; logic may be inconsistent. (50% 失败率)