#43117 [NEW]: using preg_replace count parameter (in wiki) causes total server meltdown

From: commentgg at hotmail dot com Operating system: Windows XP SP2 PHP version: 5.2.4 PHP Bug Type: Reproducible crash Bug description: using preg_replace count parameter (in wiki) causes total server meltdown Description: ------------ The wiki in development went from delivering total meltdown on the server to being very stable just by changing the code from: $n=0; preg_replace(/../,'..',$x,-1,$n); if($n) .. to $new = preg_replace(/../,'..',$x); if($new != $x) .. I.e. do not use the count parameter! Reproduce code: --------------- I can't give you any specifics yet, but I spent 3 days narrowing down and then having the above solve the problem for me. Sorry can't help you out better. Actual result: -------------- Crashes brought the Apache webserver (not the absolute latest) down on my pre 5.2.4 version. Upgrading to the latest PHP (5.2.4) delivered a better experience as the server managed to recover. In both cases no error message was given. It all just ends in the Windows Application Crash - Send Report feedback loop dialog box. Twice. Maybe this is a PECL issue, but it is severe enough to warrant attention. -- Edit bug report at http://bugs.php.net/?id=43117&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=43117&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=43117&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=43117&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=43117&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=43117&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=43117&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=43117&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=43117&r=needscript Try newer version: http://bugs.php.net/fix.php?id=43117&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=43117&r=support Expected behavior: http://bugs.php.net/fix.php?id=43117&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=43117&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=43117&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=43117&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=43117&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=43117&r=dst IIS Stability: http://bugs.php.net/fix.php?id=43117&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=43117&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=43117&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=43117&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=43117&r=mysqlcfg