mysqltest crashes upon --sync_slave_with_master without active connection

--source include/master-slave.inc

--connect (con1,localhost,root,,)

--disconnect con1

--sync_slave_with_master

# Cleanup

--connection master

--source include/rpl_end.inc

--echo # Done

#3  <signal handler called>

#4  0x00005632ad5b8631 in mysql_real_query (mysql=0x0, query=0x5632ad637917 "show master status", length=18) at /data/src/10.3/libmariadb/libmariadb/mariadb_lib.c:2168

#5  0x00005632ad5b7a8f in mysql_query (mysql=0x0, query=0x5632ad637917 "show master status") at /data/src/10.3/libmariadb/libmariadb/mariadb_lib.c:1959

#6  0x00005632ad599941 in wrap_mysql_query (mysql=0x0, q=0x5632ad637917 "show master status") at /data/src/10.3/client/../tests/nonblock-wrappers.h:252

#7  0x00005632ad5a38dc in do_save_master_pos () at /data/src/10.3/client/mysqltest.cc:4912

#8  0x00005632ad5adc5b in main (argc=12, argv=0x7ffde2ee2798) at /data/src/10.3/client/mysqltest.cc:9521