From @masak

<jnthn> rakudo​: say (1, undef, 2, 3).grep(*.defined).perl
<p6eval> rakudo 0d4fe0​: OUTPUT«set_integer_keyed() not implemented in
class 'Sub' [...]
<jnthn> masak​: I think above in that grep example is a Rakudo bug?
<masak> jnthn​: looks like.
<masak> somebody should ticket that.
* masak submits rakudobug
<jnthn> rakudo​: *.defined
<p6eval> rakudo 0d4fe0​: OUTPUT«set_integer_keyed() not implemented in
class 'Sub' [...]
<jnthn> ...epic wtf...
<jnthn> Well, minimized. :-)

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S02-builtin_data_types/whatever.t

commit dada8eb50be9e008fac26b67e35f3e1676ff5822
Author​: kyle <kyle@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Mon Oct 26 03​:42​:12 2009 +0000

  [t/spec] Test for RT 68714
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;28895 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S02-builtin_data_types/whatever.t b/t/spec/S02-builtin_data_types/whatever.t
index 256cb3b..40fc7e6 100644
--- a/t/spec/S02-builtin_data_types/whatever.t
+++ b/t/spec/S02-builtin_data_types/whatever.t
@@ -92,6 +92,16 @@ is @a, [1,2,3,4], '*.meth created closure works';
 #?rakudo todo 'RT 65482'
 is (0,0,0,0,0,0) >>+>> ((1,2) xx *), <1 2 1 2 1 2>, 'xx * works';
 
+#?rakudo skip 'RT 68714'
+{
+    is (1, undef, 2, 3).grep(*.defined), <1 2 3>, '*.defined works in grep';
+
+    my $rt68714 = *.defined;
+    ok $rt68714 ~~ Code, '*.defined generates a closure';
+    ok $rt68714(68714), '*.defined works (true)';
+    ok $rt68714(undef), '*.defined works (false)';
+}
+
 done_testing;
 
 # vim: ft=perl6

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

From @ShimmerFairy

<lue> rakudo​: *.defined
<p6eval> rakudo 53da4c​: ( no output )
<lue> rakudo​: say (1, undef, 2, 3).grep(*.defined).perl
<p6eval> rakudo 53da4c​: OUTPUT«===SORRY!===␤Unsupported use of undef as
a value; in Perl 6 please use something more specific​: [etc etc etc]

*.defined produces a simple (no output) and the grepping example
produces an unrelated error about undef not being usable.

There are tests and now, it's also fixed. I'm closing this ticket.
--
Don't Panic!

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