From @moritz

10​:00 < moritz> nom​: (2/3) but True
10​:00 <+p6eval> nom 6b1cba​: OUTPUT«Can not get non-existent attribute
  '$!numerator' on class '$?CLASS'␤ in block <anon> at
  /tmp/7qizKFLfFP​:1␤␤»
10​:01 < moritz> what the merge changed was that the attributes are now
declared in a role

...

10​:07 < jnthn> Oh. Only happens with but.
10​:09 < jnthn> nom​: role A { has $!a }; class B does A { }; A.new.clone()
10​:09 <+p6eval> nom 6b1cba​: OUTPUT«Can not get non-existent attribute
'$!a' on
  class '$?CLASS'␤ in block <anon> at /tmp/pJMnk5Pq1B​:1␤␤»
10​:09 < jnthn> Bingo.

10​:15 < moritz> nom​: role A { has $.a }; class B does A { }; for
B.^attributes
  { say $_; pir​::say pir​::typeof__SP($_.package) }
10​:15 <+p6eval> nom 6b1cba​: OUTPUT«$!a␤$?CLASS␤»
10​:15 < moritz> somehow the exception got eaten :(
10​:15 < jnthn> It's a type variable.
10​:15 < jnthn> And should complain loudly about being used

There's a failing test for that in t/spec/S14-roles/mixin.t

From @jnthn

On Mon Feb 13 01​:26​:00 2012, moritz wrote​:

10​:00 < moritz> nom​: (2/3) but True
10​:00 <+p6eval> nom 6b1cba​: OUTPUT«Can not get non-existent attribute
'$!numerator' on class '$?CLASS'␤ in block <anon> at
/tmp/7qizKFLfFP​:1␤␤»
10​:01 < moritz> what the merge changed was that the attributes are now
declared in a role

...

10​:07 < jnthn> Oh. Only happens with but.
10​:09 < jnthn> nom​: role A { has $!a }; class B does A { }; A.new.clone()
10​:09 <+p6eval> nom 6b1cba​: OUTPUT«Can not get non-existent attribute
'$!a' on
class '$?CLASS'␤ in block <anon> at /tmp/pJMnk5Pq1B​:1␤␤»
10​:09 < jnthn> Bingo.

10​:15 < moritz> nom​: role A { has $.a }; class B does A { }; for
B.^attributes
{ say $_; pir​::say pir​::typeof__SP($_.package) }
10​:15 <+p6eval> nom 6b1cba​: OUTPUT«$!a␤$?CLASS␤»
10​:15 < moritz> somehow the exception got eaten :(
10​:15 < jnthn> It's a type variable.
10​:15 < jnthn> And should complain loudly about being used

There's a failing test for that in t/spec/S14-roles/mixin.t

Fixed; that test is passing again, so resolving ticket.

/jnthn

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

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