Using statement modifiers on a my declaration results in undefined behaviour. So the answer is "don't do that" ;-) (see perlsyn)

"Undefined" means, as always, that anything can happen. The "do { my $x = ... } for (1 .. 3)" version is not such a case (the modifier is on do, not my), so that's why it behaves reasonably.

In reply to Re: Lexical scope vs. postfix loops (perl bug?) by Tanktalus
in thread Lexical scope vs. postfix loops (perl bug?) by jh

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