# 恐慌：运行时错误：向已关闭的通道发送数据（ticker.C）

- **ID:** `go/goroutine-ticker-stop-leak`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

在time.Ticker停止后使用它，如果计时器触发会导致向已关闭的通道发送数据。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 1.18 | active | — | — |
| 1.19 | active | — | — |
| 1.20 | active | — | — |
| 1.21 | active | — | — |
| 1.22 | active | — | — |

## 解决方案

1. **Stop ticker and drain channel before closing** (90% 成功率)
   ```
   ticker.Stop(); ticker.C = nil // or use select with done channel
   ```
2. **Use time.NewTicker with a done channel** (95% 成功率)
   ```
   done := make(chan struct{}); go func() { for { select { case <-ticker.C: // handle case <-done: return } } }()
   ```

## 无效尝试

- **Ignoring ticker stop** — Causes goroutine leak and potential panic. (90% 失败率)
- **Using recover() to catch panic** — Does not prevent data race on ticker.C. (85% 失败率)