Description:
------------
Segmentation fault when serializing multidimentional recursive arrays. The code below works fine with 4.3.11 (again on FC4).
When the argument is passend by reference (which is deprecated):
print_r(unserialize(serialize(&$arr1)));
it is fine. 
Or passing a reference:
print_r(unserialize(serialize($ref=&$arr1)));
also works.
No problem with serializing just $arr1[0]=&$arr;


Reproduce code:
---------------
<?
$arr1[0][0] =& $arr1;
print_r(unserialize(serialize($arr1)));
?>

Expected result:
----------------
Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [0] => Array
 *RECURSION*
                        )

                )

        )

)


Actual result:
--------------
Segmentation fault