perfschema.aggregate fails sporadically in buildbot

perfschema.aggregate                     w1 [ fail ]

        Test ended at 2014-11-24 10:43:58

CURRENT_TEST: perfschema.aggregate

--- /var/lib/buildbot/maria-slave/work-opensuse-amd64/build/mysql-test/suite/perfschema/r/aggregate.result	2014-11-24 06:08:54.000000000 +0200

+++ /var/lib/buildbot/maria-slave/work-opensuse-amd64/build/mysql-test/suite/perfschema/r/aggregate.reject	2014-11-24 10:43:58.000000000 +0200

@@ -112,6 +112,7 @@

 HAVING (e.MAX_TIMER_WAIT < MAX(t.MAX_TIMER_WAIT))

 OR @dump_all;

 EVENT_NAME	MAX_TIMER_WAIT	MAX(t.MAX_TIMER_WAIT)

+wait/synch/cond/aria/SERVICE_THREAD_CONTROL::COND_control	0	16703213736912

 update performance_schema.setup_consumers set enabled = 'YES';

 update performance_schema.setup_instruments

 set enabled = 'YES', timed = 'YES';

mysqltest: Result length mismatch