[perl #63892] Null PMC access when a string variable is included in a regex

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<masak> rakudo: my $a = "foo"; $a ~~ /$a/; say "alive"
<p6eval> rakudo 5b1ff9: OUTPUT«Null PMC access in get_string() [...]
<masak> is this a known one? how do I work around it?
* masak submits rakudobug
<masak> rakudo: my $a = "foo"; my $workaround = eval("/'$a'/"); say $a
~~ $workaround
<p6eval> rakudo 5b1ff9: OUTPUT«foo␤»
<masak> that works.