Description:
------------
When running the code found below, PHP seems to choke in recursions.

Naturally, the code itself is flawed; but this flaw should not be capable of segfaulting PHP. This can be seen as both a security and a stability flaw.

Reproduce code:
---------------
<? 
 
function foo($bar) { 
     
    if(is_array($bar)) 
        foreach($bar as $k => $v) 
            print $k." => ".foo($v); 
    else 
        var_export($bar); 
} 
 
foo($GLOBALS); 
 
?>

Expected result:
----------------
Fatal error: Nesting level too deep - recursive dependency?

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1212631376 (LWP 5087)]
0xb76bd359 in zend_hash_quick_find () from /usr/lib/apache2/modules/libphp5.so
(gdb) bt
#0  0xb76bd359 in zend_hash_quick_find () from /usr/lib/apache2/modules/libphp5.so
#1  0xb76d4a90 in execute () from /usr/lib/apache2/modules/libphp5.so
#2  0xb76d35cd in execute () from /usr/lib/apache2/modules/libphp5.so
#3  0xb76d38ea in execute () from /usr/lib/apache2/modules/libphp5.so
#4  0xb76d35cd in execute () from /usr/lib/apache2/modules/libphp5.so
#5  0xb76d38ea in execute () from /usr/lib/apache2/modules/libphp5.so
#6  0xb76d35cd in execute () from /usr/lib/apache2/modules/libphp5.so
...