Description:
------------
Sometimes when PHP tries to allocate too much memory, it crashes without an error message and produces a blank screen.

Reproduce code:
---------------
This occurs after running this script (it doesn't crash always, so try to refresh 5-10 times until it returns nothing (zero sized reply)):

<?php
function myErrorHandler($errno, $errmsg, $filename, $linenum, $vars) {
ini_set('memory_limit', '10M');
echo "Error occured";
die();
};

ini_set('memory_limit', '1M');
error_reporting(E_ALL | E_STRICT);
set_error_handler('myErrorHandler');
$a=array();
$aLen=rand(2048,65535);
echo "trying to initialize an array with ".$aLen." items (randomly generated)...
\n";
$i=0;
while ($i<$aLen && (rand(1,65534)<65533 || rand(1,65534)>2)) {
     $varName='a_'.chr(rand(65,90)).chr(rand(65,90)).chr(rand(65,90)).chr(rand(65,90)).chr(rand(65,90));
     $$varName=rand(0,255);
     //$a[]=rand(0,255);
    $i++;
};
echo "successfuly initialized an array with ".count($a)." items. please refresh";
?>

Expected result:
----------------
Usually (in normal cases) the error handler should write "Error occured" to the output and end the script.

Looks like the code allocates small chunks of memory (about 40 bytes), and when it tries to allocate the next chunk and it doesn't have enough memory, it tries to trigger an error, BUT there is the problem that by triggering error 4 or 5 parameters are passed to the error handler - that means PHP needs to allocate space for them. But the error message text itself has more than 100 charactes, so it doesn't fit to the free memory block and PHP just crashes. So it seems to be a PHP bug.

Actual result:
--------------
Zero sized reply (MS IE7) or blank screen (FF 1.5)