[perl #68652] [BUG] Less than awesome error message when passing a bareword as a role parameter in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<masak> rakudo: role Self[Self] {}
<p6eval> rakudo 0d4fe0: OUTPUT«set_pmc_keyed() not implemented in
class 'Integer' [...]
<masak> std: role Self[Self] {}
<p6eval> std 28021: OUTPUT«===SORRY!===␤Invalid
typename Self at /tmp/1OlrJQaA7X line 1:␤------> role
Self[Self⏏] {}␤FAILED 00:03 41m␤»
* masak submits rakudobug
<masak> rakudo: role Self[Foo] {}
<p6eval> rakudo 0d4fe0: OUTPUT«set_pmc_keyed() not implemented in
class 'Integer' [...]