#35123 [Opn->Fbk]: here's how to seg fault php everytime by doing simple OOP
| From: | johannes@php.net | Date: | Sun, 06 Nov 2005 08:52:18 +0000 |
| Subject: | #35123 [Opn->Fbk]: here's how to seg fault php everytime by doing simple OOP | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-87671@lists.php.net to get a copy of this message | ||
ID: 35123
Updated by: johannes@php.net
Reported By: joe at popcast dot com
-Status: Open
+Status: Feedback
Bug Type: Reproducible crash
Operating System: linux, XP, Mac
PHP Version: 5.0.5
New Comment:
Please try using this CVS snapshot:
http://snaps.php.net/php5-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5-win32-latest.zip
Previous Comments:
------------------------------------------------------------------------
[2005-11-06 09:42:14] joe at popcast dot com
Description:
------------
Using PHP from the standard Windows installer and running under Apache,
the following code both produces unexpected output and crashes PHP. The
code is a simple OOP variable test.
A similar bug was posted (http://bugs.php.net/bug.php?id=26930) but did
not crash PHP.
To reproduce the crash, uncomment the test method in class B or C and
seg fault away.
The bug is reproducible on every OS I've tested, including Linux and
Mac with standard PHP installs running under Apache.
Reproduce code:
---------------
class A {
protected static $instance;
public $test = "A";
public function getInstance()
{
if (! self::$instance) self::$instance = new A;
return self::$instance;
}
public function test()
{
echo $this->test;
}
}
class B extends A
{
protected static $instance;
//protected $test = "B";
public function getInstance()
{
if (! self::$instance) self::$instance = new B;
self::$instance->test = "B";
return self::$instance;
}
/*
public function test()
{
echo $this->test();
}
*/
}
class C extends A
{
protected static $instance;
//protected $test = "C";
public function getInstance()
{
if (! self::$instance) self::$instance = new C;
self::$instance->test = "C";
return self::$instance;
}
/*
public function test()
{
echo $this->test();
}
*/
}
$a = new A;
$a->test();
echo "\n----------<br>\n";
$b = new B;
$a->test();
$b->test();
echo "\n----------<br>\n";
$c = new C;
$a->test();
$b->test();
$c->test();
echo "\n----------<br>\n";
Expected result:
----------------
A
----------
AB
----------
ABC
----------
Actual result:
--------------
A
----------
AA
----------
AAA
----------
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=35123&edit=1