From @masak

<masak> rakudo​: my $a = "a"; $a ~~ / $a /; say $/.chars
<p6eval> rakudo 0a04ef​: OUTPUT«-4␤»
<jnthn> Erm. :-)
<masak> I'm slightly uncomfortable with .chars ever returning
something negative.
<masak> tempted to submit that as a rakudobug.
<jnthn> It has unlength.
* moritz_ yawns. Another manifestation of $/ not being a proper Match object
<masak> "that's the shortest string I've ever seen!"
<moritz_> rakudo​: my $a = "a"; $a ~~ / $a /; say ?$/
<p6eval> rakudo 0a04ef​: OUTPUT«0␤»
<snarkyboojum> length with direction :)
<moritz_> so, a failed match
<masak> I know.
<moritz_> which has .from > .to
<masak> I know.
<masak> PGE and GGE do the same.
<masak> alpha​: "foo" ~~ /bar/; say $/.chars
<p6eval> alpha 30e0ed​: OUTPUT«0␤»
<masak> moritz_​: still don't manifest that bug.
<moritz_> masak​: just submit it; one more ticket I can close when I
get proper Match objects running in Perl 6
* masak submits rakudobug

From @moritz

Fixed in nqp-rx and rakudo, and tested in S05-match/positions.t

@moritz - Status changed from 'new' to 'resolved'