[perl #62172] Rakudo forgets about the length of an array passed twice as a parameter

[Carl Mäsak]

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<masak> perl6: my @a = 1..8; sub foo(@a) { say +...@a; bar(@a) }; sub
bar(@a) { say +...@a }; foo(@a)
<p6eval> rakudo 35345: OUTPUT«8␤1␤»
<p6eval> ..pugs: OUTPUT«8␤8␤»
<p6eval> ..elf 24854: OUTPUT«1␤1␤»
* masak submits rakudobug