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问题
群管定时器绑定的 QQ 未连接或已断线时,
zero.GetBot(SelfID)会返回nil。sendmsg未检查空值便访问ctx.Event,导致空指针 panic,进程退出。另外,cron 在注册任务时缓存 bot 上下文。如果注册时账号尚未连接,即使之后上线,任务仍使用原来的空上下文。
修改
sendmsg中增加空值检查,账号不可用时跳过发送,保护普通定时器和 cron 两条路径。ctx。