[perl #74454] [BUG] Null PMC access when calling a sub with an optional 'is copy' hash (Associative) parameter in Rakudo

[Carl Mäsak]

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<masak> rakudo: sub foo(%hash? is copy) {}; foo
<p6eval> rakudo 78faa0: OUTPUT«Null PMC access in invoke()␤current
instr.: 'perl6;Hash[];!STORE' [...]
* masak submits rakudobug
<jnthn> wtf
<jnthn> Two is copy bugs in two days. I should smack ma binder up.