# panic: 未持锁时调用 Cond.Broadcast

- **ID:** `go/condition-broadcast-without-lock`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

在未持有相关联的 Locker 的情况下调用 sync.Cond.Broadcast() 或 Signal()，违反了文档约定。

## 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. **** (96% 成功率)
   ```
   c.L.Lock()
// mutate predicate
c.Broadcast()
c.L.Unlock()
   ```
2. **** (85% 成功率)
   ```
   close(done) // wakes all waiters without a Cond
   ```

## 无效尝试

- **** — Still not holding the lock when Broadcast executes; panic persists. (85% 失败率)
- **** — Burns CPU and reintroduces races on the shared predicate. (70% 失败率)