Wikimedia Bugzilla is closed!

From support desk: https://www.mediawiki.org/wiki/Thread:Project:Support_desk/Error_when_trying_to_install_MediaWiki_1.20.2

It would appear supplying the wrong password to installer gives a rather ugly error message and plenty of headers already sent warnings. (Note I haven't tried this myself, I'm going solely on the reported error - and the fact its an access denied error. Its possible the situation may be more complicated then a simple wrong db pass.)

The error the user received is:

Warning: Cannot modify header information - headers already sent in C:\xampp\htdocs\wiki\includes\Exception.php on line 269

Warning: Cannot modify header information - headers already sent in C:\xampp\htdocs\wiki\includes\Exception.php on line 270

Warning: Cannot modify header information - headers already sent in C:\xampp\htdocs\wiki\includes\Exception.php on line 229 A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: CREATE DATABASE `my_wiki` from within function "MysqlInstaller::setupDatabase". Database returned error "1044: Access denied for user @'localhost' to database 'my_wiki' (localhost)". Backtrace:

   1. 0 C:\xampp\htdocs\wiki\includes\db\Database.php(916): DatabaseBase->reportQueryError('Access denied f...', 1044, 'CREATE DATABASE...', 'MysqlInstaller:...', false)
   2. 1 C:\xampp\htdocs\wiki\includes\installer\MysqlInstaller.php(469): DatabaseBase->query('CREATE DATABASE...', 'MysqlInstaller:...')
   3. 2 [internal function]: MysqlInstaller->setupDatabase(Object(MysqlInstaller))
   4. 3 C:\xampp\htdocs\wiki\includes\installer\Installer.php(1454): call_user_func(Array, Object(MysqlInstaller))
   5. 4 C:\xampp\htdocs\wiki\includes\installer\WebInstallerPage.php(1161): Installer->performInstallation(Array, Array)
   6. 5 C:\xampp\htdocs\wiki\includes\installer\WebInstaller.php(269): WebInstaller_Install->execute()
   7. 6 C:\xampp\htdocs\wiki\mw-config\index.php(50): WebInstaller->execute(Array)
   8. 7 C:\xampp\htdocs\wiki\mw-config\index.php(18): wfInstallerMain()
   9. 8 {main}