[perl #69893] [BUG] __CANDIDATE_LIST__ not found trying to define custom routine trait

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# New Ticket Created by  Matthew Walton 
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15:22 <@mathw> rakudo: role woowoo {}; multi trait_mod:<is>(Routine $c, woowoo)
               { $c.wrap: sub { say "Woowoo" } }; sub foo is woowoo { say "foo"
               }; foo();
15:22 < p6eval> rakudo 827734: OUTPUT«Lexical '__CANDIDATE_LIST__' not found␤in
                Main (file src/gen_setting.pm, line 206)␤»

Not good