Sorry to come by so late Sergei, but I was clearing some old bug today. I think - as you already point out - this might much more be an issue of libmysqlclient.20 ver maria-10 - therefore I'm adding the package of mysql who owns the lib for the experience and context of Lars and Robie woh work on it to take a look at this.
** Also affects: mysql-5.7 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1660503 Title: Malformed packet with mariadb-server-10.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/1660503/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs