plugins.processlist failed in buildbot with wrong result

plugins.processlist 'innodb'             w4 [ fail ]

        Test ended at 2018-06-22 20:49:44

CURRENT_TEST: plugins.processlist

--- /usr/share/mysql/mysql-test/suite/plugins/r/processlist.result	2018-06-22 18:33:37.000000000 -0400

+++ /dev/shm/var/4/log/processlist.reject	2018-06-22 20:49:44.323041213 -0400

@@ -3,9 +3,9 @@

 insert t1 values (1);

 connect con2,localhost,root;

 state from show engine innodb status

- 

+ cleaning up

 state from show processlist

-

+cleaning up

 disconnect con2;

 connection default;

 drop table t1;

mysqltest: Result length mismatch