I've just updated MariaDB using apt-get dist-upgrade. Now it won't start using service mysql start anymore.
I can however, run it as root or do: sudo -u mysql mysqld_safe then MariaDB starts up fine. The folder /home/mysql is owned by the mysql user and group.
I've found the error to be thrown in this function:https://github.com/MariaDB/server/blob/7ff44b1a832b005264994cbdfc52f93f69b92cdc/sql/mysqld.cc#L9865
I can't figure out what to do next. Any pointers?