my $pid = spawn($cmd, undef, $opt);
my $reap = PublicInbox::OnDestroy->new($lei->can('sigint_reap'), $pid);
waitpid($pid, 0) == $pid or die "waitpid @$cmd: $!";
my $pid = spawn($cmd, undef, $opt);
my $reap = PublicInbox::OnDestroy->new($lei->can('sigint_reap'), $pid);
waitpid($pid, 0) == $pid or die "waitpid @$cmd: $!";