From @moritz

10​:50 < moritz_> rakudo​: Bool does role { method Str() { $.perl } }; say
  ~Bool​::True
10​:50 <+p6eval> rakudo 9808d7​: OUTPUT«Attempt to use rebless_subclass
where the new class was not a subclass␤ in 'infix​:<does>' at line
6379​:CORE.setting␤ in 'infix​:<does>' at line 525​:CORE.setting␤
  in main program body at line 22​:/tmp/vsMNEIdThV␤»

@coke - Status changed from 'new' to 'open'

From @jnthn

On Tue Jul 27 01​:53​:17 2010, moritz wrote​:

10​:50 < moritz_> rakudo​: Bool does role { method Str() { $.perl } }; say
~Bool​::True
10​:50 <+p6eval> rakudo 9808d7​: OUTPUT«Attempt to use rebless_subclass
where the new class was not a subclass␤ in 'infix​:<does>' at line
6379​:CORE.setting␤ in 'infix​:<does>' at line 525​:CORE.setting␤
in main program body at line 22​:/tmp/vsMNEIdThV␤»

Better now​:

Bool does role { method Str() { $.perl } }; say ~Bool​::True
Cannot use 'does' operator with a type object

Guess we want to test this, or give it a typed exception...tagging
testneeded.

/jnthn

From @FROGGS

Test​:
Raku/roast@e87efa1

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