#35239 [NEW]: Objects can lose references
| From: | dmitry@php.net | Date: | Wed, 16 Nov 2005 11:05:22 +0000 |
| Subject: | #35239 [NEW]: Objects can lose references | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-88267@lists.php.net to get a copy of this message | ||
From: dmitry@php.net
Operating system: *
PHP version: 6CVS-2005-11-16 (CVS)
PHP Bug Type: Scripting Engine problem
Bug description: Objects can lose references
Description:
------------
Assignment by reference to property may lose reference.
Reproduce code:
---------------
<?php
$a = new stdClass;
$a->x0 = new stdClass;
$a->x0->y0 = 'a';
$a->x0->y1 =& $a->x0;
$a->x0->y2 =& $a->x0;
$a->x0->y0 = 'b';
var_dump($a);
?>
Expected result:
----------------
object(stdClass)#1 (1) {
["x0"]=>
&object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
&object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
*RECURSION*
["y2"]=>
*RECURSION*
}
["y2"]=>
&object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
*RECURSION*
["y2"]=>
*RECURSION*
}
}
}
Actual result:
--------------
object(stdClass)#1 (1) {
["x0"]=>
object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
*RECURSION*
["y2"]=>
*RECURSION*
}
["y2"]=>
object(stdClass)#2 (3) {
["y0"]=>
string(1) "b"
["y1"]=>
*RECURSION*
["y2"]=>
*RECURSION*
}
}
}
/home/dmitry/php/php5.1/Zend/zend_vm_execute.h(393) : Freeing 0x08B29C94
(16 bytes), script=ass4.php
=== Total 1 memory leaks detected ===
--
Edit bug report at http://bugs.php.net/?id=35239&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35239&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=35239&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=35239&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=35239&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=35239&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35239&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35239&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35239&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35239&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35239&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=35239&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=35239&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35239&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35239&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35239&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35239&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35239&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35239&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35239&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35239&r=mysqlcfg