fix panic.

main.go

@@ -225,12 +225,24 @@ func main() {
 			log.Debug("Protocol -> " + e.Message)
 		}
 	})
+	cli.OnServerUpdated(func(bot *client.QQClient, e *client.ServerUpdatedEvent) {
+		log.Infof("收到服务器地址更新通知, 将在下一次重连时应用. 服务器地址: %v:%v 服务器位置: %v", e.Servers[0].Server, e.Servers[0].Port, e.Servers[0].Location)
+		_ = ioutil.WriteFile("servers.bin", binary.NewWriterF(func(w *binary.Writer) {
+			w.WriteUInt16(uint16(len(e.Servers)))
+			for _, s := range e.Servers {
+				if !strings.Contains(s.Server, "com") {
+					w.WriteString(s.Server)
+					w.WriteUInt16(uint16(s.Port))
+				}
+			}
+		}), 0644)
+	})
 	if global.PathExists("servers.bin") {
 		if data, err := ioutil.ReadFile("servers.bin"); err == nil {
 			r := binary.NewReader(data)
 			r.ReadUInt16()
 			cli.CustomServer = &net.TCPAddr{
-				IP:   r.ReadBytes(4),
+				IP:   net.ParseIP(r.ReadString()),
 				Port: int(r.ReadUInt16()),
 			}
 		}
@@ -295,18 +307,6 @@ func main() {
 	}
 	log.Info("资源初始化完成, 开始处理信息.")
 	log.Info("アトリは、高性能ですから!")
-	cli.OnServerUpdated(func(bot *client.QQClient, e *client.ServerUpdatedEvent) {
-		log.Infof("收到服务器地址更新通知, 将在下一次重连时应用. 服务器地址: %v:%v 服务器位置: %v", e.Servers[0].Server, e.Servers[0].Port, e.Servers[0].Location)
-		_ = ioutil.WriteFile("servers.bin", binary.NewWriterF(func(w *binary.Writer) {
-			w.WriteUInt16(uint16(len(e.Servers)))
-			for _, s := range e.Servers {
-				if !strings.Contains(s.Server, "com") {
-					w.Write(net.ParseIP(s.Server))
-					w.WriteUInt16(uint16(s.Port))
-				}
-			}
-		}), 0644)
-	})
 	cli.OnDisconnected(func(bot *client.QQClient, e *client.ClientDisconnectedEvent) {
 		if conf.ReLogin.Enabled {
 			var times uint = 1