[perl #78280] [BUG] Null PMC access when giving a variable from a scope that doesn't exist as the default of an 'is rw' parameter and then modifying the parameter in Rakudo

[Carl Mäsak via RT]

<jnthn> rakudo: $FOO::a = 42
<p6eval> rakudo 377615: OUTPUT«Null PMC access in getprop() [...]
* masak changes the ticket