# panic: receive from closed channel (in goroutine)

- **ID:** `go/receive-from-closed-channel`
- **Domain:** go
- **Category:** runtime_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

从已关闭的通道接收数据通常不会panic，但如果接收方尝试从nil通道或类型断言时错误处理不当，可能触发panic。

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.19 | active | — | — |

## Workarounds

1. **** (95% success)
   ```
   v, ok := <-ch; if !ok { /* 处理关闭 */ }
   ```
2. **** (90% success)
   ```
   for v := range ch { /* 处理 */ }
   ```

## Dead Ends

- **** — 关闭后接收会立即返回零值，但多次接收可能混淆逻辑，导致错误处理。 (60% fail)
- **** — range会在通道关闭时退出，但如果循环外有其他接收，可能遗漏。 (50% fail)