Ahhhh... and he was enlightened. Basically, $i here is operated on as if it was:

my $i;
foreach local $i (0 .. 5){
                    ...
}
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Do you have any ideas/pointers to the rationale for "no array members?" I understand that it is so, but fail to understand why it is so, when (for instance) one can local-ize individual array members.