$kq->EV_SET($fd, EVFILT_READ, kq_flag(EPOLLIN, $ev));
eval { $kq->EV_SET($fd, EVFILT_WRITE, kq_flag(EPOLLOUT, $ev)) };
} elsif ($op == EPOLL_CTL_DEL) {
+ use Carp ();
+ $kq // Carp::confess("nokq $fd");
$kq->EV_SET($fd, EVFILT_READ, EV_DISABLE);
eval { $kq->EV_SET($fd, EVFILT_WRITE, EV_DISABLE) };
} else { # EPOLL_CTL_ADD