ID: 28892
Updated by: [EMAIL PROTECTED]
-Summary: Object id that's still in use gets reassigned
Reported By: paranoid at pcwereld dot be
-Status: Open
+Status: Verified
Bug Type: Zend Engine 2 problem
-Operating System: Windows 2k
+Operating System: All
-PHP Version: 5.0.0RC3
+PHP Version: 5.0.0+
New Comment:
Shorter reproduce script. It shows that removing one reference with
setting the variable holding it to NULL deletes the object thus leaving
one reference handing. In the script of the original reporter this
interferes with a creation of a new object of the class of the
innormally deleted one and the new objects hooks on the nirvana
reference created by the bug.
<?php
new C(new A("FUBAR"));
class A {
public $text;
function __construct($m){
$this->text = $m;
}
}
class C {
public $e;
public $e2;
function __construct($elem){
$this->e = $elem;
$this->e2 = $elem;
$this->e = null;
var_dump($this);
}
}
?>
Output :
object(C)#1 (2) {
["e"]=>
NULL
["e2"]=>
NULL
}
// "e2" has been deleted when $this->e =null; which is not correct
IMHO
Similar example works correctly :
php -r '$a=new stdclass();$b=$a; $a=null; var_dump($a,$b);'
Previous Comments:
------------------------------------------------------------------------
[2004-06-24 10:38:27] paranoid at pcwereld dot be
When using new C($a = new A()) instead of new C(new A()) the code seems
to work like expected.
------------------------------------------------------------------------
[2004-06-23 12:59:04] paranoid at pcwereld dot be
Description:
------------
PHP reassigns an allready-in-use object id to a newly created object,
after the first object (that loses it's id) was removed from an array,
but was still referenced in another object.
Reproduce code:
---------------
http://users.pandora.be/paranet/poc.html
Expected result:
----------------
I expected that object C would still contain a reference to the first A
object (A-1) i created, ...
Actual result:
--------------
(see comments in code for the actual output)
... instead A-1 was overwritten with a second A object (A-2) i created,
that (!!!!!) used the same object id as the first A object.
PHP seems to be missing the fact that A-1 is still referenced inside
the C object, and thus assigns the object id A-1 was using to A-2
Removing the part marked "important" in list_remove results in a normal
behaviour, eg. C refers to A-1, not A-2. And A-2 doesn't get the same
object id as A-1. The bug is probably somewhere in the code that
removes an object from an array.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=28892&edit=1
