[perl #77520] [BUG] Internal Parrot error when introspecting the signature of an &assuming'd code block in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<TimToady> rakudo: say { $^x }.assuming(1).signature
<p6eval> rakudo 6ccdcd: OUTPUT«get_attr_str() not implemented in class
'Sub' [...]
<moritz_> rakudo: say { $^x }.assuming(1).signature.perl
<p6eval> rakudo 6ccdcd: OUTPUT«get_attr_str() not implemented in class
'Sub' [...]
* masak submits a rakudobug for the get_attr_str() error
<masak> rakudo: say (-> { "!" }).signature.perl
<p6eval> rakudo 6ccdcd: OUTPUT«:()␤»