ID: 41562
User updated by: christian dot kaps at imaxx21 dot com
Reported By: christian dot kaps at imaxx21 dot com
-Status: Feedback
+Status: Open
Bug Type: Scripting Engine problem
Operating System: Ubuntu 7.04 (Feisty)
PHP Version: 5.2.3
New Comment:
Sorry for my poor englisch.
I think this script is the trigger for this problem. But it is not the
only one. I can`t say what the other is!?
<?php
class Config_SimpleXML extends SimpleXMLIterator
{
public function xpath($query, $index = null)
{
$result = parent::xpath($query);
if (!$result) {
return array();
} elseif (is_numeric($index)) {
return $result[(int) $index];
}
return $result;
}
public function parent()
{
$parent = $this->xpath('parent::*', 0);
return $parent;
}
public function removeChild(Config_SimpleXML $child)
{
$cnt = 0;
$childXml = $child->asXml();
$this->rewind();
while ($this->valid()) {
if ($childXml === $this->current()->asXml()) {
if (isset($this->{$this->key()}->{$cnt})) {
unset($this->{$this->key()}->{$cnt});
} else {
unset($this->{$this->key()});
}
break;
}
$cnt++;
$this->next();
}
$this->rewind();
}
}
$xml = '<config><parent><child>text</child></parent></config>';
$xml = simplexml_load_string($xml, 'Config_SimpleXML');
$element = $xml->xpath('.//child', 0);
$element->parent()->removeChild($element);
?>
I use this to remove a node from an xml document. When i use the dom
object to remove the node, the error doesn`t occur.
What I can say is that the error occurs not ever when i call the
removeChild method. I have a script which has 2 calls of this method.
The first call is ok the second throws this error. Whereat not the call
himself is the segfault trigger, but in our environment where i can
reproduce the error it is a exit statement that throws the segfault
error.
A downgrade to version 5.2.2. fix this issue. I can remember that in
version 5.1.6 the error occurs too.
Previous Comments:
------------------------------------------------------------------------
[2007-06-03 16:09:38] [EMAIL PROTECTED]
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
------------------------------------------------------------------------
[2007-06-01 15:48:50] christian dot kaps at imaxx21 dot com
Description:
------------
Hi
I get a segmentation fault error in My apache logs. The problem is that
I can reprocude the error in our environment but i can`t locate the
error in the script.
I hope the backtrace helps.
Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1216653632 (LWP 13009)]
zend_hash_destroy (ht=0x844562b) at
/usr/src/php-5.2.3/Zend/zend_hash.c:524
524 p = p->pListNext;
(gdb) bt
#0 zend_hash_destroy (ht=0x844562b) at
/usr/src/php-5.2.3/Zend/zend_hash.c:524
#1 0xb74bf853 in zend_object_std_dtor (object=0x8445b0c,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45
#2 0xb74bf889 in zend_objects_free_object_storage (object=0x8445b0c,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122
#3 0xb74c3056 in zend_objects_store_del_ref_by_handle (handle=70,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:206
#4 0xb74c30af in zend_objects_store_del_ref (zobject=0x8445758,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:168
#5 0xb74a3c39 in _zval_dtor_func (zvalue=0x8445758) at
/usr/src/php-5.2.3/Zend/zend_variables.c:52
#6 0xb7497058 in _zval_ptr_dtor (zval_ptr=0x8432ef0) at
/usr/src/php-5.2.3/Zend/zend_variables.h:35
#7 0xb74af266 in zend_hash_destroy (ht=0xb6c66fa4) at
/usr/src/php-5.2.3/Zend/zend_hash.c:526
#8 0xb74bf853 in zend_object_std_dtor (object=0x842d3d8,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45
#9 0xb74bf889 in zend_objects_free_object_storage (object=0x842d3d8,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122
#10 0xb74c3056 in zend_objects_store_del_ref_by_handle (handle=65,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:206
#11 0xb74c30af in zend_objects_store_del_ref (zobject=0x8431da0,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:168
#12 0xb74a3c39 in _zval_dtor_func (zvalue=0x8431da0) at
/usr/src/php-5.2.3/Zend/zend_variables.c:52
#13 0xb7497058 in _zval_ptr_dtor (zval_ptr=0xb6c3cbc0) at
/usr/src/php-5.2.3/Zend/zend_variables.h:35
#14 0xb74af266 in zend_hash_destroy (ht=0xb6c3c858) at
/usr/src/php-5.2.3/Zend/zend_hash.c:526
#15 0xb74bf853 in zend_object_std_dtor (object=0xb6c42178,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45
#16 0xb74bf889 in zend_objects_free_object_storage (object=0xb6c42178,
tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122
#17 0xb74c2b44 in zend_objects_store_free_object_storage
(objects=0x81e4d70, tsrm_ls=0x818c650) at
/usr/src/php-5.2.3/Zend/zend_objects_API.c:89
#18 0xb74976b8 in shutdown_executor (tsrm_ls=0x818c650) at
/usr/src/php-5.2.3/Zend/zend_execute_API.c:299
#19 0xb74a4339 in zend_deactivate (tsrm_ls=0x818c650) at
/usr/src/php-5.2.3/Zend/zend.c:860
#20 0xb745badc in php_request_shutdown (dummy=0x0) at
/usr/src/php-5.2.3/main/main.c:1317
#21 0xb752607b in php_handler (r=0x83592f0) at
/usr/src/php-5.2.3/sapi/apache2handler/sapi_apache2.c:463
#22 0x08079099 in ap_run_handler ()
#23 0x0807c3e1 in ap_invoke_handler ()
#24 0x0808947a in ap_internal_redirect ()
#25 0xb7782d10 in ?? () from /usr/lib/apache2/modules/mod_rewrite.so
#26 0x083592e0 in ?? ()
#27 0x08350cc0 in ?? ()
#28 0x00000000 in ?? ()
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