Related to bug #33432 ?

Can you try this patch and see if it fixes this bug and 33432?
http://www.ctindustries.net/patches/dom.diff.txt

Can't reproduce this with FC 3 x86_64 (gcc 3.4.3) but think this may be the problem caught by gcc 4.

Still crashes with latest CVS HEAD.

Was it a fresh/clean build?
if so, can you try the following and add your configure?

$dom = DOMDocument::loadXML('<root a="1" b="2" />');
$atts = $dom->documentElement->attributes;
var_dump($atts->item(0));
var_dump($atts->item(0)->nodeName);

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 46912496219840 (LWP 21164)]
0x00000000005752c8 in zend_object_store_get_object (zobject=0x0)
    at /usr/src/php/php5/Zend/zend_objects_API.c:202
202             zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
(gdb) bt 
#0  0x00000000005752c8 in zend_object_store_get_object (zobject=0x0)
    at /usr/src/php/php5/Zend/zend_objects_API.c:202
#1  0x00000000004595f1 in zif_dom_namednodemap_item (ht=1, return_value=0x865270, return_value_ptr=0x0, 
    this_ptr=0x864f30, return_value_used=1) at /usr/src/php/php5/ext/dom/namednodemap.c:182
#2  0x00000000005858ea in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffff8d2d70)
    at /usr/src/php/php5/Zend/zend_vm_execute.h:184
#3  0x000000000058642e in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (execute_data=0x7fffff8d2d70)
    at /usr/src/php/php5/Zend/zend_vm_execute.h:299
#4  0x00000000005854aa in execute (op_array=0x8600e0) at /usr/src/php/php5/Zend/zend_vm_execute.h:87
#5  0x0000000000555118 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /usr/src/php/php5/Zend/zend.c:1080
#6  0x0000000000502ebb in php_execute_script (primary_file=0x7fffff8d53d0)
    at /usr/src/php/php5/main/main.c:1671
#7  0x00000000005dd2ea in main (argc=2, argv=0x7fffff8d55a8) at /usr/src/php/php5/sapi/cli/php_cli.c:1039

Configure line was:
'../php5/configure' '--disable-all' '--with-xsl' '--enable-dom' '--enable-libxml' '-
-enable-debug' '--disable-cgi'

And yes, I always do clean builds. (./cvsclean&&./buildconf)

Just making sure as I cant find anything wrong there.
Can you try something else as tracking this down is little difficult here.

first: any idea what is happening within zend_parse_method_parameters for the item methods?
paritcular interested in what object and ce are as well as what happens within zend_parse_va_args.

and do the following changes work? I had hit this same problem using zend_parse_method_parameters about a year back in a different extension and assumed I had bad builds as it resolved itself after about a week and many rebuilds.

in namenodemap.c for PHP_FUNCTION(dom_namednodemap_item), change:

	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Ol", &id, dom_namednodemap_class_entry, &index) == FAILURE) {

to

id = getThis();

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &index) == FAILURE) {

might want to also do the same change in nodelist.c for PHP_FUNCTION(dom_nodelist_item)

This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.