[perl #116204] [BUG] Null PMC access when hitting 'last' in code block in regex in loop in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<masak> r: repeat while False { "foo" ~~ / 'f' { say "got here" } 'o'
{ last } / }; say "after the loop"
<p6eval> rakudo c8de2e: OUTPUT«got here␤Null PMC access in
find_method('sink') [...]
* masak submits rakudobug
<masak> Merry Null PMC Christmas, everybody.