binlog_encryption.rpl_checksum failed in buildbot with wrong result

binlog_encryption.rpl_checksum 'mix'     w3 [ fail ]

        Test ended at 2018-08-10 08:06:38

CURRENT_TEST: binlog_encryption.rpl_checksum

--- /usr/share/mysql-test/suite/binlog_encryption/rpl_checksum.result	2018-08-10 07:04:53.000000000 +0000

+++ /dev/shm/var/3/log/rpl_checksum.reject	2018-08-10 08:06:37.861418314 +0000

@@ -79,7 +79,7 @@

 set @@global.debug_dbug='d,simulate_slave_unaware_checksum';

 start slave;

 include/wait_for_slave_io_error.inc [errno=1236]

-Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'Slave can not handle replication events with the checksum that master is configured to log; the first event 'master-bin.000009' at 411, the last event read from 'master-bin.000010' at 4, the last byte read from 'master-bin.000010' at 256.''

+Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'Slave can not handle replication events with the checksum that master is configured to log; the first event 'master-bin.000009' at 371, the last event read from 'master-bin.000010' at 4, the last byte read from 'master-bin.000010' at 256.''

 select count(*) as zero from t1;

 zero

 0

mysqltest: Result content mismatch