#43310 [Com]: crash with References and unset
| From: | crrodriguez+php at suse dot de | Date: | Fri, 16 Nov 2007 10:32:43 +0000 |
| Subject: | #43310 [Com]: crash with References and unset | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-119724@lists.php.net to get a copy of this message | ||
ID: 43310
Comment by: crrodriguez+php at suse dot de
Reported By: commander at graphicore dot de
Status: Feedback
Bug Type: Reproducible crash
Operating System: Linux, WinXp
PHP Version: 5.2.5
New Comment:
this is the deal
5_3 is fine
5_2 non-debug = Crashes
5_2 debug
Starting program: /home/cristian/5.2/sapi/cli/php ../crash.php
4 objects are loaded
Warning: array_keys(): The first argument should be an array in
/home/cristian/crash.php on line 18
3 objects are loaded
[Fri Nov 16 07:27:03 2007] Script: '../crash.php'
/home/cristian/5.2/Zend/zend_vm_execute.h(405) : Freeing 0x0096A6A8
(24 bytes), script=../crash.php
Last leak repeated 2 times
[Fri Nov 16 07:27:03 2007] Script: '../crash.php'
/home/cristian/5.2/Zend/zend_execute.c(1009) : Freeing 0x0096C890 (71
bytes), script=../crash.php
/home/cristian/5.2/Zend/zend_hash.c(388) : Actual location (location
was relayed)
Last leak repeated 2 times
[Fri Nov 16 07:27:03 2007] Script: '../crash.php'
/home/cristian/5.2/Zend/zend_execute.c(1061) : Freeing 0x0096F748 (24
bytes), script=../crash.php
Last leak repeated 1 time
[Fri Nov 16 07:27:03 2007] Script: '../crash.php'
/home/cristian/5.2/Zend/zend_execute.c(1065) : Freeing 0x0096F7B8 (72
bytes), script=../crash.php
/home/cristian/5.2/Zend/zend_API.c(821) : Actual location (location was
relayed)
Last leak repeated 3 times
[Fri Nov 16 07:27:03 2007] Script: '../crash.php'
/home/cristian/5.2/Zend/zend_hash.c(247) : Freeing 0x0096FB38 (79
bytes), script=../crash.php
=== Total 13 memory leaks detected ===
Previous Comments:
------------------------------------------------------------------------
[2007-11-16 00:51:03] jani@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php
for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php
for Win32
Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.
------------------------------------------------------------------------
[2007-11-16 00:32:00] felipensp at gmail dot com
Works fine in PHP 5.3.0-dev (cli) (built: Nov 15 2007 18:47:59)
------------------------------------------------------------------------
[2007-11-15 23:18:37] commander at graphicore dot de
Description:
------------
The code crashes the Apache process immediately. The crash occurs with
other functions(array_values, print_r, gettype, ...) instead of
array_keys() as well.
To avoid the crash delete the reference in Line 7 to copy the array
that contains the references. That was intended anyway.
However, it took hours to find the problem. A Runtime-Error or
something like that would be nice.
Systems:
Linux(Ubuntu): Apache/2.2.4 PHP/5.2.3-1ubuntu6
Apache error.log:
[Thu Nov 15 23:18:48 2007] [notice] child pid 2874 exit signal
Segmentation fault (11)
WinXp: Apache/2.2.3 (Win32) PHP Version 4.4.4
Apache error.log:
[Thu Nov 15 23:43:43 2007] [notice] Parent: child process exited with
status 3221225477 -- Restarting.
best regards
Reproduce code:
---------------
<?php
class aClass{
var $arr;
function makeObjects($load){
for($i = 1; $load >= $i; $i++){
$this->arr['objects'][$i] = new aClass();
$this->arr['objects'][$i]->arr =& $this->arr;//copying
$this->arr avoids the crash
}
echo count($this->arr['objects']).' objects are
loaded'."\n";
}
}
$root = new aClass();
$objects[0] =& $root;
$root->arr['objects'] =& $objects;
$load = 3;
$root->makeObjects($load);
unset($objects[$load]);//unset the last object
array_keys($root->arr['objects']);//crash
echo count($objects).' objects are loaded';
?>
Expected result:
----------------
4 objects are loaded
3 objects are loaded
Actual result:
--------------
the process crashes, no warning, no error
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=43310&edit=1