#31300 [Ver->Fbk]: ArrayAccess and __get crash when using string concat in key

ID: 31300 Updated by: tony2001@php.net Reported By: gardan at gmx dot com -Status: Verified +Status: Feedback Bug Type: Zend Engine 2 problem Operating System: * PHP Version: 5CVS-2005-01-10 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip Can't reproduce with latest HEAD & 5.0. Previous Comments: ------------------------------------------------------------------------ [2005-03-05 03:55:23] matt dot bevan at marginsoftware dot com Consider this bug confirmed using Apache/2.0.52 (Gentoo/Linux) PHP/5.0.3 but is not re-producible in a small amount of code. In my case, performing strange acts got around the bug when using the array access more than once with three other variable assignments in-between the first call and second: - The first dot-concatenated call worked fine. - The second segfaulted Apache, unless: - The first call is commented out, or - The second call is placed right below the first, or - One line of three lines is commented out. - All array accesses are changed to use sprintf not dot concatenation. It doesn't matter which line of the three simple, static variable assignments is commented. This bug drove me crazy all today. I'm going to have nightmares about this bug. ;) ------------------------------------------------------------------------ [2005-01-11 08:24:01] helly@php.net ArrayAccess is defined and controlled by the engine not SPL ------------------------------------------------------------------------ [2004-12-26 22:40:38] gardan at gmx dot com Still crashing with cvs snapshot (Windows). ------------------------------------------------------------------------ [2004-12-26 12:24:08] derick@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip ------------------------------------------------------------------------ [2004-12-26 07:32:35] Beater at orgalan dot de I can partially confirm this for 5.0.3 running on Windows XP. The behaviour is very unpredictable. Following you'll find some test cases and the behaviour on my system. class arr implements ArrayAccess { public $x = array("ab_cd" => "hello"); function offsetExists($offset) { return isset($this->x[$offset]); } function offsetSet($offset, $value) { $this->x[$offset] = $value; } function offsetGet($offset) { return $this->x[$offset]; } function offsetUnset($offset) { unset($this->x[$offset]); } function __get($offset) { return $this->x[$offset]; } } $test = new arr; case 1: -------------------- echo($test["ab"."_cd"]); // crashs case 2: -------------------- echo($test["ab_cd"]); // works echo($test["ab"."_cd"]); // works case 3: echo($test["ab_cd"]); // works echo($test->{"ab_cd"}); // works echo($test["ab"."_cd"]); // crashs sounds stupid, but you'll confirm it, i guess ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/31300 -- Edit this bug report at http://bugs.php.net/?id=31300&edit=1