go runtime_error ai_generated true

panic: 未持锁时调用 Cond.Broadcast

panic: sync: Cond.Broadcast called without lock held

ID: go/condition-broadcast-without-lock

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-10-09首次发现

版本兼容性

版本状态引入弃用备注
1.18 active — — —
1.20 active — — —
1.22 active — — —

根因分析

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。

English

sync.Cond.Broadcast() or Signal() is called without holding the associated Locker, violating the documented contract.

generic

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

常见但无效的做法:

  1. 85% 失败

    Still not holding the lock when Broadcast executes; panic persists.

  2. 70% 失败

    Burns CPU and reintroduces races on the shared predicate.