message: using clone on a copy type
diff: @@ -503,7 +503,7 @@ impl<S: Networker, R: RequestHandler<S>> Pool<S, R> {
  let active_timeout = self.active_timeout;
  let conn_limit = self.conn_limit;
  let preordered_nodes = self.preordered_nodes.clone();
  - let number_read_nodes = self.number_read_nodes.clone();
  + let number_read_nodes = self.number_read_nodes;
  self.worker = Some(thread::spawn(move || {
  let mut pool_thread: PoolThread<S, R> = PoolThread::new(cmd_socket, name, id,
  timeout, extended_timeout,
  