--- AnyEvent-MP/MP.pm	2012/03/09 19:07:53	1.131
+++ AnyEvent-MP/MP.pm	2012/03/10 20:34:11	1.132
@@ -400,15 +400,15 @@
 
 sub rcv($@);
 
-sub _kilme {
+my $KILME = sub {
    die "received message on port without callback";
-}
+};
 
 sub port(;&) {
    my $id = $UNIQ . ++$ID;
    my $port = "$NODE#$id";
 
-   rcv $port, shift || \&_kilme;
+   rcv $port, shift || $KILME;
 
    $port
 }
@@ -993,6 +993,9 @@
 respectively. If no keys have changed then the array reference might be
 C<undef> or even missing.
 
+If not called in void context, a guard object is returned that, when
+destroyed, stops the monitor.
+
 The family hash reference and the key arrays belong to AnyEvent::MP and
 B<must not be modified or stored> by the callback. When in doubt, make a
 copy.