perfschema.stage_mdl_function failed in buildbot with wrong result

perfschema.stage_mdl_function            w4 [ fail ]

        Test ended at 2019-06-20 07:35:45

CURRENT_TEST: perfschema.stage_mdl_function

--- D:/win32-debug/build/src/mysql-test/suite/perfschema/r/stage_mdl_function.result	2019-06-20 06:18:34.794359800 +0000

+++ D:\win32-debug\build\src\mysql-test\suite\perfschema\r\stage_mdl_function.reject	2019-06-20 07:35:44.596999800 +0000

@@ -31,6 +31,8 @@

 user2	stage/sql/Waiting for stored function metadata lock	STATEMENT

 username	event_name	nesting_event_type

 user2	stage/sql/Init	STATEMENT

+user2	stage/sql/Waiting for stored function metadata lock	STATEMENT

+user2	stage/sql/Init	STATEMENT

 connection con1;

 select f1();

 f1()

mysqltest: Result length mismatch