main.show_explain_ps fails sporadically in buildbot

main.show_explain_ps                     w3 [ fail ]

        Test ended at 2016-07-03 18:36:27

CURRENT_TEST: main.show_explain_ps

--- /home/buildbot/maria-slave/power8-vlp03-bintar-debug/build/mysql-test/r/show_explain_ps.result	2016-07-03 15:54:00.100512059 -0400

+++ /home/buildbot/maria-slave/power8-vlp03-bintar-debug/build/mysql-test/r/show_explain_ps.reject	2016-07-03 18:36:27.201444865 -0400

@@ -31,5 +31,4 @@

 from performance_schema.events_waits_history_long 

 where event_name='wait/synch/cond/sql/show_explain';

 event_name

-wait/synch/cond/sql/show_explain

 drop table t0;

mysqltest: Result length mismatch