ID: 41050 User updated by: legolas558 at users dot sourceforge dot net Reported By: legolas558 at users dot sourceforge dot net Status: Bogus Bug Type: PCRE related Operating System: Windows XP SP2 PHP Version: 4.4.6 New Comment:
G.Baconniere kindly provided a patch to downgrade PHP 4.4.6's internal PCRE7 to PCRE6.6 http://www.infomaniak.ch/php4/php-4.4.6-downgrade_pcre.patch I have not tested it, however the author is trusted. Note: use at your own risk, you will not take advantage of the bugfixes in PCRE7 Previous Comments: ------------------------------------------------------------------------ [2007-04-16 15:34:10] legolas558 at users dot sourceforge dot net I found a workaround for my own problem, maybe it will help other users or help individuating the bug. <?php // by legolas558 $regex = "(?i:begin|start)\\s+([^']*('[^']*')*)*"; $old_php_regex = "/".$regex."/"; // notice the greedy/ungreedy change which actually works around the segmentation fault $bug41050_regex = "/".$regex."?/"; // test case $subject = "begin\nnon string 'string' other non string"; // will work on any PHP - also the latest versions with PCRE7 preg_match_all($bug41050_regex, $subject, $m); echo '<pre>';var_dump($m);echo '</pre>'; unset($m); // will cause a segmentation fault (and so a 500 server error) if used on PHP versions compiled with PCRE7 // preg_match_all($old_php_regex, $subject, $m); echo '<pre>';var_dump($m);echo '</pre>'; ?> ------------------------------------------------------------------------ [2007-04-11 14:08:23] legolas558 at users dot sourceforge dot net Of course. But did you check if the bug(s) also happens out of PHP? e.g. if it is ONLY a PCRE bug? ------------------------------------------------------------------------ [2007-04-11 14:01:59] [EMAIL PROTECTED] We can't fix PCRE. ------------------------------------------------------------------------ [2007-04-11 12:00:42] legolas558 at users dot sourceforge dot net I have tested the subject and regex in a C snippet and the segmentation fault does not happen So the bug is someway related to PHP's usage (maybe initialization and reset?) of the PCRE library More tests would be needed, of course ------------------------------------------------------------------------ [2007-04-11 11:39:31] legolas558 at users dot sourceforge dot net I understand. I will try to contact the PCRE mantainer, and if he is not working on the issue I will try to get my hands dirt and patch it myself. If I end up with a patch for the PCRE library I hope it will be accepted in PHP's CVS tree If the bug is not reproducible out of PHP (with a C testcase, for example) there are high chances that it is a PHP-related bug. I will now test the bug out of PHP and see if it still happens. ------------------------------------------------------------------------ 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/41050 -- Edit this bug report at http://bugs.php.net/?id=41050&edit=1
