#43179 [Opn->Bgs]: Segfault on combo of recursive array, class members and variable variables

[johannes]

 ID:               43179
 Updated by:       [EMAIL PROTECTED]
 Reported By:      php at lorddeath dot net
-Status:           Open
+Status:           Bogus
 Bug Type:         Reproducible crash
 Operating System: Windows / Linux
 PHP Version:      5.2.4
 New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

That's an infinite recursion which will use all stack space.


Previous Comments:
------------------------------------------------------------------------

[2007-11-02 15:59:07] php at lorddeath dot net

Sorry; got the code wrong.  This, however, segfaults as "expected":
<?
class MC {
        public $Vars = array();
        public function Execute() {
                foreach ($this->Vars as $k => $v) { $$k = $v; }
                $MyArr['Var'] = $MyArr;
                $MC = new MC();
                $MC->Vars = $MyArr;
                $MC->Execute();
        }
}
$MyArr = array();
$MyArr['Var'] = $MyArr;
$MC = new MC();
$MC->Vars = $MyArr;
$MC->Execute();
echo "Hello world.";
?>

------------------------------------------------------------------------

[2007-11-02 15:55:46] php at lorddeath dot net

Description:
------------
When the code I've supplied is executed, PHP crashes, leaving a
segfault message in Apache's log.

The code looks a little perverse, though a variation on it had a real
use in my situation, but regardless, PHP shouldn't segfault, no matter
how perverse the code is :)

Reproduce code:
---------------
class MC {
        public $Vars = array();
        public function Execute() {
                if (!defined('DONE')) {
                        define('DONE', true);
                        foreach ($this->Vars as $k => $v) { $$k = $v; }
                        $MyArr['Var'] = $MyArr;
                        $MC = new MC();
                        $MC->Vars = $MyArr;
                        $MC->Execute();
                }
        }
}
$MyArr = array();
$MyArr['Var'] = $MyArr;
$MC = new MC();
$MC->Vars = $MyArr;
$MC->Execute();
echo "Hello world.";

Expected result:
----------------
"Hello world." should be printed.

Actual result:
--------------
Nothing is printed, and a segfault line is added to
/var/log/apache2/error.log:
[Fri Nov 02 15:50:11 2007] [notice] child pid 23282 exit signal
Segmentation fault (11)


------------------------------------------------------------------------


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Edit this bug report at http://bugs.php.net/?id=43179&edit=1