[perl #68134] [BUG] Null PMC Access when doing 'does Role[::T]' in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
# Please include the string:  [perl #68134]
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# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=68134 >


<masak> rakudo: class Foo does Positional[::T] {}; say Foo ~~ Positional
<p6eval> rakudo c57fbd: OUTPUT«Null PMC access in isa()␤in Main [...]
* masak submits rakudobug
<masak> rakudo: role A {}; class Foo does A[::T] {}
<p6eval> rakudo c57fbd: OUTPUT«Null PMC access in isa()␤in Main [...]