FYI, given the code:

    my (undef, $a, undef, $b, @rest, $c) = (1, 2, 3, 4, 5, 6, 7, 8);
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@rest will be greedily assigned (5, 6, 7, 8) whereas ($a, $b, $c) will be (2, 4, undef) respectively.