go
runtime_error
ai_generated
true
致命错误:所有 goroutine 都已休眠 - 死锁!(sync.Once.Do 递归调用自身)
fatal error: all goroutines are asleep - deadlock! (sync.Once.Do calling itself)
ID: go/sync-once-deadlock-recursive
80%修复率
86%置信度
0证据数
2024-06-30首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| 1.21 | active | — | — | — |
| 1.22 | active | — | — | — |
根因分析
sync.Once.Do 的函数再次(直接或间接)调用同一个 Once.Do,永久阻塞在自己的互斥锁上。
English
A sync.Once.Do function calls the same Once.Do again (directly or indirectly), blocking on its own mutex forever.
解决方案
-
95% 成功率
Ensure the function passed to Do never calls the same Once; extract shared init into a separate helper
-
88% 成功率
Use sync.OnceFunc/OnceValue (Go 1.21+) and keep init logic non-reentrant
无效尝试
常见但无效的做法:
-
90% 失败
Once holds an internal mutex with no timeout support; deadlock persists
-
80% 失败
Loses thread-safety; introduces data races