rpl.rpl_extra_col_master_myisam, rpl.rpl_slave_load_tmpdir_not_exist failed in buildbot with a warning

rpl.rpl_extra_col_master_myisam 'row'    w2 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-10-25 12:17:47

line

2017-10-25 12:17:46 2948291392 [Warning] Master is configured to log replication events with checksum, but will not send such events to slaves that cannot process them

^ Found warnings in /dev/shm/var/2/log/mysqld.1.err

ok

 - saving '/dev/shm/var/2/log/rpl.rpl_extra_col_master_myisam-row/' to '/dev/shm/var/log/rpl.rpl_extra_col_master_myisam-row/'

Retrying test rpl.rpl_extra_col_master_myisam, attempt(2/3)...

rpl.rpl_slave_load_tmpdir_not_exist 'stmt' w3 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-09-27 20:34:55

line

2017-09-27 20:34:55 140341914171136 [Warning] Master is configured to log replication events with checksum, but will not send such events to slaves that cannot process them

^ Found warnings in /mnt/buildbot/build/mariadb-10.2.10/mysql-test/var/3/log/mysqld.1.err

ok

 - saving '/mnt/buildbot/build/mariadb-10.2.10/mysql-test/var/3/log/rpl.rpl_slave_load_tmpdir_not_exist-stmt/' to '/mnt/buildbot/build/mariadb-10.2.10/mysql-test/var/log/rpl.rpl_slave_load_tmpdir_not_exist-stmt/'

Retrying test rpl.rpl_slave_load_tmpdir_not_exist, attempt(2/3)...