[perl #69498] [BUG] Null PMC access when calling routines with forward-referring parameters (which shouldn't compile in the first place) in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=69498 >


<masak> rakudo: sub foo($a = $default, :$default = 42) {}; say "alive"
<p6eval> rakudo c8181a: OUTPUT«alive␤»
<masak> std: sub foo($a = $default, :$default = 42) {}
<p6eval> std 28514: OUTPUT«ok 00:02 104m␤»
<masak> rakudo: sub foo($a = $default, :$default = 42) { say $a }; foo
<p6eval> rakudo c8181a: OUTPUT«Null PMC access in isa()␤in sub foo [...]
* masak submits rakudobug
<masak> today is a day of good harvest :)
<moritz_> uhm, why doesn't STD.pm complain about $default not being defined?
<masak> STD bug?
<moritz_> STD bug.
* masak hightlights TimToady
<masak> rakudo: sub foo($a = $default, :$default = 42) { say 'alive' }; foo
<p6eval> rakudo c8181a: OUTPUT«Null PMC access in isa()␤in sub foo