Description:
------------
PHP caused Segmentation fault probably on code
$node = clone ($condition ? $DOMElement1 : $DOMElement2);

Test script:
---------------
// This piece of code actually loads some XML elements via xPath
$firstNode = $domElement->getElementsByTagName( 'div')->item(0);
$secondNode = $domElement->getElementsByTagName( 'div')->item(1);

// The problematic line
$node = clone ((rand()%2) ? $firstNode : $secondNode);

// // After retyping code to:
// $node = ((rand()%2) ? clone $firstNode : clone $secondNode);
// // All started working just fine (maybe it's coincidence) 

Expected result:
----------------
One node is domElement for "thumb up" and the other node is domElement for "thumb 
down" (for product rating in e-shop), I've tried to create new html based on xml 
templates.

Actual result:
--------------
Mos of the time I got error 302 from server and proxy error or "Empty result"

In log always repeated this: 
[Mon Jul 04 18:20:39 2011] [notice] child pid 5825 exit signal Segmentation 
fault (11)


Sometimes:

[Mon Jul 04 18:20:39 2011] [notice] child pid 5825 exit signal Segmentation 
fault (11)
*** glibc detected *** /usr/sbin/httpd: double free or corruption (!prev): 
0x0000000001980e20 ***
======= Backtrace: =========
/lib/libc.so.6(+0x7366a)[0x7f819f69166a]
/lib/libc.so.6(cfree+0x6c)[0x7f819f69554c]
/etc/httpd/modules/libphp5.so(php_libxml_node_decrement_resource+0x80)
[0x7f8194c9b590]
/etc/httpd/modules/libphp5.so(+0xf2c6f)[0x7f8194ca3c6f]
/etc/httpd/modules/libphp5.so(zend_objects_store_del_ref_by_handle_ex+0x257)
[0x7f8194e65167]
/etc/httpd/modules/libphp5.so(zend_objects_store_del_ref+0x13)[0x7f8194e65183]
/etc/httpd/modules/libphp5.so(_zval_ptr_dtor+0x41)[0x7f8194e32681]
/etc/httpd/modules/libphp5.so(zend_hash_destroy+0x40)[0x7f8194e4dda0]
/etc/httpd/modules/libphp5.so(_zval_dtor_func+0x7f)[0x7f8194e4009f]
/etc/httpd/modules/libphp5.so(_zval_ptr_dtor+0x41)[0x7f8194e32681]
/etc/httpd/modules/libphp5.so(+0xf2b7e)[0x7f8194ca3b7e]
/etc/httpd/modules/libphp5.so(zend_objects_store_del_ref_by_handle_ex+0x23f)
[0x7f8194e6514f]
/etc/httpd/modules/libphp5.so(zend_objects_store_del_ref+0x13)[0x7f8194e65183]
/etc/httpd/modules/libphp5.so(_zval_ptr_dtor+0x41)[0x7f8194e32681]
/etc/httpd/modules/libphp5.so(+0x29b70e)[0x7f8194e4c70e]
/etc/httpd/modules/libphp5.so(zend_hash_reverse_apply+0x71)[0x7f8194e4e241]
/etc/httpd/modules/libphp5.so(+0x281a31)[0x7f8194e32a31]
/etc/httpd/modules/libphp5.so(+0x28fd17)[0x7f8194e40d17]
/etc/httpd/modules/libphp5.so(php_request_shutdown+0x33d)[0x7f8194deefcd]
/etc/httpd/modules/libphp5.so(+0x323367)[0x7f8194ed4367]
/usr/sbin/httpd(ap_run_handler+0x48)[0x438ad8]
/usr/sbin/httpd(ap_invoke_handler+0xce)[0x438f3e]
/usr/sbin/httpd(ap_process_request+0x190)[0x445d60]

/usr/sbin/httpd[0x442d70]
/usr/sbin/httpd(ap_run_process_connection+0x48)[0x43f0f8]
/usr/sbin/httpd[0x44a22f]
/usr/sbin/httpd[0x44a94c]
/usr/sbin/httpd(ap_mpm_run+0x9d2)[0x44b4a2]
/usr/sbin/httpd(main+0xb44)[0x424554]
/lib/libc.so.6(__libc_start_main+0xed)[0x7f819f63f17d]
/usr/sbin/httpd[0x424601]
======= Memory map: ========
00400000-00460000 r-xp 00000000 fe:01 861362                             
/usr/sbin/httpd
0065f000-00664000 rw-p 0005f000 fe:01 861362                             
/usr/sbin/httpd
00664000-00667000 rw-p 00000000 00:00 0 
01571000-04298000 rw-p 00000000 00:00 0                                  [heap]
7f818c000000-7f818c021000 rw-p 00000000 00:00 0 
7f818c021000-7f8190000000 ---p 00000000 00:00 0 
7f81914b1000-7f81914c6000 r-xp 00000000 fe:01 631049                     
/usr/lib/libgcc_s.so.1
...
And few hundreds of similar lines.






On ArchLinux:
extra/php 5.3.6-4 [installed]

With:
extension=gd.so
extension=gettext.so
extension=iconv.so
extension=json.so
extension=ldap.so
extension=mcrypt.so
extension=mysql.so
extension=pdo_mysql.so
extension=soap.so
extension=sockets.so
extension=tidy.so
extension=xmlrpc.so