[Perl6] Seq iterator already consumed

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The iterator of this Seq is already in use/consumed by another Seq
(you might solve this by adding .cache on usages of the Seq, or
by assigning the Seq into an array)

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use v6;

...

    return $text.lines;
}

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11:03 >perl6 -v
This is Rakudo Star version 2019.03.1 built on MoarVM version 2019.03
implementing Perl 6.d.

12:14 >

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