Re^3: How foreach loops decide what to iterate through

[jasonk]

Essentially what you are doing is something like this:

my @a = (1);

for ( my $i = 0 ; $i <= $#a ; $i++ ) {
    push( @a, 1 );
}

So the loop isn't being restarted or re-evaluated, but because you are extending the thing it's iterating over, it never gets to the end.