Same problem here! Several tools are no longer working, since we have to hold back the update (e.g. OCS Inventory, Nagios Thruk).
nm -D /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18 | egrep 'lib(mariadb|mysql)client_18' 0000000000000000 A libmariadbclient_18 nm -D /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 | egrep 'lib(mariadb|mysql)client_18' 0000000000000000 A libmysqlclient_18 dpkg -S /usr/lib/x86_64-linux-gnu/libmysql* libmysqlclient-dev: /usr/lib/x86_64-linux-gnu/libmysqlclient.a libmysqlclient-dev: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.a libmysqlclient-dev: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18 libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18.0.0 libmysqlclient-dev: /usr/lib/x86_64-linux-gnu/libmysqlclient.so libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18.0.0 dpkg -S /usr/lib/x86_64-linux-gnu/libmaria* libmariadbclient18:amd64: /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18 libmariadbclient18:amd64: /usr/lib/x86_64-linux-gnu/libmariadbclient.so.18.0.0 >What does 'dpkg -S /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18' say? libmysqlclient18:amd64: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 For the reference: It not a clean install! It's a several years old system. First install was Debian 6 and upgraded three times via dist-upgrade: 6->7->8->9 Do you need more information? Daniel