[perl #63786] Rakudo dies with a Null PMC access when referring to variables that haven't been declared yet

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
# Please include the string:  [perl #63786]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=63786 >


<masak> rakudo: my @a = $b; my $b = 5
<p6eval> rakudo 0c893b: OUTPUT«Null PMC access in isa() [...]
* masak submits rakudobug