sys_vars.delayed_insert_limit_func fails in buildbot with wrong result

sys_vars.delayed_insert_limit_func       w3 [ fail ]

        Test ended at 2018-11-09 09:45:35

CURRENT_TEST: sys_vars.delayed_insert_limit_func

--- /usr/share/mysql-test/suite/sys_vars/r/delayed_insert_limit_func.result	2018-11-09 07:22:37.000000000 +0000

+++ /dev/shm/var/3/log/delayed_insert_limit_func.reject	2018-11-09 09:45:35.065221760 +0000

@@ -65,7 +65,7 @@

 The next result suffers from

 '# Bug#35386 insert delayed inserts 1 + limit rows instead of just limit rows'

 COUNT(*)

-21

+15

 connection default;

 Checking if the delayed insert continued afterwards

 SELECT COUNT(*) FROM t1;

mysqltest: Result content mismatch