Description:
------------
Sample error on system with 4+ Gbyte memory:

Fatal error: Out of memory (allocated -1119879168) (tried to allocate 1048581 bytes) in /usr/local/sbin/1/!testing0.php on line 13

Why displayed memory is negative? Int is using?

Test script:
---------------
<?php
ini_set('memory_limit', '3072M');
ini_set('display_startup_errors',1);
error_reporting(2045);
ini_set('display_errors',1);

$a = "";
for ($i = 0; $i < 1024; ++$i) $a .= chr($i%256);
$b = "";
for ($i = 0; $i < 1024; ++$i) $b .= $a;
$a = array();
for ($i = 0; $i < 4096; ++$i) $a[$i] = $b.$i;
?>