pipe(my ($r, $w)) or die "pipe: $!";
is(epoll_ctl($epfd, EPOLL_CTL_ADD, fileno($w), EPOLLOUT), 0,
'epoll_ctl socket EPOLLOUT');
my @events;
pipe(my ($r, $w)) or die "pipe: $!";
is(epoll_ctl($epfd, EPOLL_CTL_ADD, fileno($w), EPOLLOUT), 0,
'epoll_ctl socket EPOLLOUT');
my @events;