When I try to install ezpublish, after applying the patch 07_EZSP-005-EZP5.2.diff
the installation gets stalled and I noticed I get the following error in Apache logs:

[Fri Jul 18 10:04:56 2014] [error] [client 192.168.2.67] PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000] [1044] Access denied for user ''@'localhost' to database 'none'' in /var/www/ezpublish52_CS1/vendor/zetacomponents/database/src/handler.php:104\nStack trace:\n#0 /var/www/ezpublish52_CS1/vendor/zetacomponents/database/src/handler.php(104): PDO->_construct('mysql:dbname=no...', 'user', NULL, Array)\n#1 /var/www/ezpublish52_CS1/vendor/zetacomponents/database/src/handlers/mysql.php(127): ezcDbHandler->construct(Array, 'mysql:dbname=no...')\n#2 /var/www/ezpublish52_CS1/vendor/zetacomponents/database/src/factory.php(178): ezcDbHandlerMysql->_construct(Array)\n#3 /var/www/ezpublish52_CS1/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/Persistence/Legacy/EzcDbHandler.php(97): ezcDbFactory::create(Array)\n#4 /var/www/ezpublish52_CS1/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishCoreBundle/ApiLoader/LegacyDbHandlerFactory.php(37): eZ\\Publish\\Core\\Persistence\\Legacy\\EzcDbHandler::create(Array)\n#5 /var/www/ezpublish52_CS1/ezpublish/cache/prod/ezpubli in /var/www/ezpublish52_CS1/vendor/zetacomponents/database/src/handler.php on line 104

Up until applying the patch 06_EZSP-004-EZP5.2.diff the installation process goes ok.

I also noticed this error gets dumped in logs when I try to clean cache:
php ezpublish/console ^Cche:clear --env=prod