Last modified: 2013-07-30 00:10:40 UTC
Just started deploying the current mediawiki-1.19.1 as per http://www.mediawiki.org/wiki/Manual:Installation_guide , on Amazon EC2 (Apache web server) The prerequisites screen (next after language selection) specified all OK but due to no GD thumbnailing would be disabled. Deployed GD via `sudo yum install php-gd` and restarted Apache server. After this, can't even get to the language selection screen - get HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request. In the server error log, I see: [Fri Jul 13 15:40:42 2012] [error] [client x.x.x.x] PHP Catchable fatal error: Argument 2 passed to Parser::parse() must be an instance of Title, null given, called in /var/www/html/mediawiki-1.19.1/includes/installer/Installer.php on line 558 and defined in /var/www/html/mediawiki-1.19.1/includes/parser/Parser.php on line 318, referer: http://site.xyz PHP Version 5.3.14 Apache Version Apache/2.2.22 (Amazon) phpinfo() reports: GD Support enabled GD Version bundled (2.0.34 compatible)
Did it work before GD was installed?
Meh, didn't see that this was in installer itself.
Max, before GD was installed (or any of its prerequisite packages, I reckon), I was indeed getting to the language selection screen (the very first screen after clicking the "Please complete the installation" link on the new deployment), as well as the next screen that reported on the environment - all without any web server errors. After GD was installed, clicking the "Please complete the installation" link was generating server error 500 as reported above. I've even tried blowing away the mediawiki directory and re-extracting the .tar.gz, to reset the install process - still the same error. So it must be due to the environmental change as a result of GD.
Here are the exact effects from running sudo yum install php-gd : [root@corp1]# cat /var/log/yum.log | grep 'Jul 13 ' Jul 13 15:27:58 Updated: php-common-5.3.14-2.21.amzn1.x86_64 Jul 13 15:27:59 Updated: php-cli-5.3.14-2.21.amzn1.x86_64 Jul 13 15:27:59 Updated: php-pdo-5.3.14-2.21.amzn1.x86_64 Jul 13 15:27:59 Installed: libXpm-3.5.8-2.8.amzn1.x86_64 Jul 13 15:27:59 Installed: t1lib-5.1.2-6.5.amzn1.x86_64 Jul 13 15:27:59 Installed: php-gd-5.3.14-2.21.amzn1.x86_64 Jul 13 15:28:00 Updated: php-mysql-5.3.14-2.21.amzn1.x86_64 Jul 13 15:28:00 Updated: php-5.3.14-2.21.amzn1.x86_64
Issue appears to be in function secureAndSplit inside Title.php, this line is returning NULL: $dbkey = preg_replace( '/[ _\xA0\x{1680}\x{180E}\x{2000}-\x{200A}\x{2028}\x{2029}\x{202F}\x{205F}\x{3000}]+/u', '_', $dbkey );
Stacktrace needed to see the caller stack and find the Title::newFromText or Title::makeTitleSafe call. Than it can be checked, if the return value of that method is check against null before using.
