MariaDB [(none)]> install soname 'server_audit';

Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> set global server_audit_incl_users=null;

ERROR 2013 (HY000): Lost connection to MySQL server during query

stack_bottom = 0x7fdca2371d30 thread_stack 0x48000

/usr/sbin/mysqld(my_print_stacktrace+0x2b)[0xb73d0b]

/usr/sbin/mysqld(handle_fatal_signal+0x398)[0x7264e8]

/lib64/libpthread.so.0(+0xf710)[0x7fdca1fec710]

/lib64/libc.so.6(+0x134adc)[0x7fdca074aadc]

/usr/lib64/mysql/plugin/server_audit.so(+0x4f47)[0x7fdbeb3f6f47]

/usr/sbin/mysqld(_ZN17sys_var_pluginvar13global_updateEP3THDP7set_var+0x64)[0x5dd5e4]

/usr/sbin/mysqld[0x55de3c]

/usr/sbin/mysqld(_ZN7set_var6updateEP3THD+0x34)[0x55e614]

/usr/sbin/mysqld(_Z17sql_set_variablesP3THDP4ListI12set_var_baseE+0x89)[0x55f8d9]

/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x1f3c)[0x5d3e1c]

/usr/sbin/mysqld[0x5d86a2]

/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1bc0)[0x5da900]

/usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x453)[0x695f53]

/usr/sbin/mysqld(handle_one_connection+0x42)[0x696022]

/lib64/libpthread.so.0(+0x79d1)[0x7fdca1fe49d1]

/lib64/libc.so.6(clone+0x6d)[0x7fdca06fe8fd]