[perl #117167] [BUG] LTA error message when role does itself in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<diakopter> r: role F { ... }; class F does F {  }
<p6eval> rakudo 1c9939: OUTPUT«===SORRY!===␤Method 'is_composed' not
found for invocant of class
'Perl6::Metamodel::ParametricRoleGroupHOW'␤»
* masak submits rakudobug for 'F does F'