# 致命错误：所有 goroutine 都处于休眠状态 - 死锁！（涉及 2 个通道）

- **ID:** `go/deadlock-multiple-channels`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

两个 goroutine 各自等待对方发送数据的通道，导致循环等待。

## 版本兼容性

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

## 解决方案

1. **** (90% 成功率)
   ```
   ch1 := make(chan int)
ch2 := make(chan int)
go func() { ch1 <- 1; <-ch2 }()
go func() { ch2 <- 2; <-ch1 }()
   ```
2. **** (85% 成功率)
   ```
   select {
case v := <-ch1:
    // handle
case <-time.After(time.Second):
    // timeout
}
   ```

## 无效尝试

- **** — Buffers only help if sends don't block; in circular wait, both block indefinitely. (80% 失败率)
- **** — If both use timeouts, they may repeatedly timeout without progress. (60% 失败率)
- **** — More goroutines don't resolve circular dependency; they may also block. (70% 失败率)