From @masak

<masak> rakudo​: sub foo(@​a is copy) { @​a ||= -1, -1, +1, +1; say @​a };
foo([1,2,3,4]); say "alive"
<p6eval> rakudo 188755​: OUTPUT«alive␤»
* masak submits rakudobug
<masak> jnthn​: I'm expecting &foo to output something.
<jnthn> er, yeah, me too. :/
<jnthn> is it the is copy?
<masak> this feels familiar...
* masak czechs
<masak> I might have been remembering
http://rt.perl.org/rt3/Ticket/Display.html?id=74430
<jnthn> looks related.
<masak> yeah.
<masak> this goes in too, though.
<jnthn> Please add a ref to the other ticket.
<masak> sure thing :)
<jnthn> rakudo​: sub foo(@​a) { say PARROT(@​a) }; sub bar(@​a is copy) {
say PARROT(@​a) }; foo([1,2]); bar([1,2])
<p6eval> rakudo 188755​: OUTPUT«ObjectRef->ObjectRef->Array␤Array␤»
<jnthn> FAIL

From @jnthn

On Tue Jan 25 16​:03​:48 2011, masak wrote​:

<masak> rakudo​: sub foo(@​a is copy) { @​a ||= -1, -1, +1, +1; say @​a };
foo([1,2,3,4]); say "alive"
<p6eval> rakudo 188755​: OUTPUT«alive␤»
* masak submits rakudobug
<masak> jnthn​: I'm expecting &foo to output something.
<jnthn> er, yeah, me too. :/

Works these days​:

sub foo(@​a is copy) { @​a ||= -1, -1, +1, +1; say @​a }; foo([1,2,3,4]);
say "alive"
1 2 3 4
alive

Tagging testneeded.

/jnthn

The RT System itself - Status changed from 'new' to 'open'

From @moritz

Now tested in S06-traits/is-copy.t.

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