echo Range iterator outside integer range|splain
Range iterator outside integer range (#1)
    (F) One (or both) of the numeric arguments to the range operator ".."
    are outside the range which can be represented by integers internally.
    One possible workaround is to force Perl to use magical string increment
    by prepending "0" to your numbers.


##</code><code>##

sub range {
  my( $start, $end ) = @_;
  my @ret;
  while($start <= $end ){
    push @ret, $start;
    $start++;
  }
  return @ret;
}

use bignum;
my $x = 2**1024
for(range( $x , $x+2 )) {
  say
}