Master is currently broken, because it needs a schema change, but applying the schema change doesn't work:
Adding ug_expiry field to table user_groups ... Fatal error: Uncaught exception 'DBQueryError' with message 'A database query error has occurred. Did you forget to run your application's database schema updater after upgrading? Query: ALTER TABLE `bw_user_groups` DROP INDEX ug_user_group, ADD PRIMARY KEY (ug_user, ug_group), ADD COLUMN ug_expiry varbinary(14) NULL default NULL, ADD INDEX ug_expiry (ug_expiry) Function: Database::sourceFile( /srv/mediawiki/workdir/maintenance/archives/patch-user_groups-ug_expiry.sql ) Error: 1091 Can't DROP 'ug_user_group'; check that column/key exists (127.0.0.1:3306) ' in /srv/mediawiki/workdir/includes/libs/rdbms/database/Database.php:1055 Stack trace: #0 /srv/mediawiki/workdir/includes/libs/rdbms/database/Database.php(913): Database->reportQueryError() #1 /srv/mediawiki/workdir/includes/libs/rdbms/database/Database.php(3121): Database->query() #2 /srv/mediawiki/workdir/includes/libs/rdbms/database/Database.php(3070): Database->sourceStream() #3 /srv/mediawiki/workdir/includes/installer/DatabaseUpdater.php(666): Database->sourceFile() #4 /srv/mediawiki/workdir/includes/installer/DatabaseUpdater.php(734): DatabaseUpdater->applyPatch() #5 /srv/mediawiki/workdir/includes/installer/DatabaseUpdater.php(465): DatabaseUpdater->addField() #6 /srv/mediawiki/workdir/includes/installer/DatabaseUpdater.php(429): DatabaseUpdater->runUpdates() #7 /srv/mediawiki/workdir/maintenance/update.php(172): DatabaseUpdater->doUpdates() #8 /srv/mediawiki/workdir/maintenance/doMaintenance.php(119): UpdateMediaWiki->execute() #9 /srv/mediawiki/workdir/maintenance/update.php(217): include() #10 {main}