Hello Anton Avramov, not involved in packaging of isc-kea I just read your report and may have some points.
Why do you use the upstream binary of libmariadbclient.so.18. Is the stretch packaged version 10.1.37-0+deb9u1 too old? [1] And it looks like you installed the debug symbol package kea-dhcp4-server-dbgsym? Maybe you could also add kea-common-dbgsym? And if it fails with libmariadbclient18 from stretch also I would have suggested to install libmariadbclient18-dbgsym, but unfortunately it looks like there are no debug symbols from security packages broadly available [2]. (Maybe a set of local rebuilt packages for 10.1.37-0+deb9u1 including the dbgsym package?) Kind regards, Bernhard [1] https://packages.debian.org/stretch/libmariadbclient18 [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=894081
