from perldoc:
If any part of LIST is an array, foreach will get very confused if you add or remove elements within the loop body, for example with splice. So don't do that.
So we know that one should not modify foreach lists in loop: Is it safe to append to the array you are iterating over

However I wondering is that considered a bad code, when you modify "for" variables, but exit from loop immediately after that. 
use warnings;
my @a = (1,2,3);
for (@a) {
    if ($_ == 2) {
        pop @a;
        last;
    }
}
print @a;

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Such code works fine, but who knows maybe it can cause segfaults or other problems in some (future versions) of perl in rare conditions etc.

In reply to foreach argument modification inside loop, followed by return from loop by vsespb

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