main.old-mode failed in buildbot with wrong result

main.old-mode                            w1 [ fail ]

        Test ended at 2019-04-23 00:27:16

CURRENT_TEST: main.old-mode

--- /usr/local/mariadb-10.1.39-linux-x86_64/mysql-test/r/old-mode.result	2019-04-22 23:12:05.000000000 +0300

+++ /usr/local/mariadb-10.1.39-linux-x86_64/mysql-test/r/old-mode.reject	2019-04-23 00:27:16.174700158 +0300

@@ -18,6 +18,7 @@

 drop table t1,t2;

 SHOW PROCESSLIST;

 Id	User	Host	db	Command	Time	State	Info

+<Id>	root	<Host>	NULL	Killed	<Time>	<State>	NULL

 <Id>	root	<Host>	test	Query	<Time>	<State>	SHOW PROCESSLIST

 #

 # MDEV-5372 Make "CAST(time_expr AS DATETIME)" compatible with the SQL Standard)

mysqltest: Result length mismatch