fix: log nil pointer

poll_default_linux.go

@@ -238,9 +238,9 @@ func (p *defaultPoll) Control(operator *FDOperator, event PollEvent) error {
 		op, evt.events = syscall.EPOLL_CTL_DEL, syscall.EPOLLIN|syscall.EPOLLOUT|syscall.EPOLLRDHUP|syscall.EPOLLERR
 		err := EpollCtl(p.fd, op, operator.FD, &evt)
 		if err != nil {
-			fmt.Printf("DEBUG NETPOLL: operator Detach failed ! op.FD=%d, op=%p, op.pollfd[%d], this.pollfd[%d] error=%s\n",
+			fmt.Printf("DEBUG NETPOLL: operator Detach failed ! op.FD=%d, op=%p, this.pollfd[%d] error=%s\n",
 				operator.FD, operator,
-				operator.poll.(*defaultPoll).fd, p.fd,
+				p.fd,
 				err.Error())
 		}
 		return err