gcol.innodb_virtual_debug_purge failed in buildbot with wrong result

gcol.innodb_virtual_debug_purge 'innodb' w3 [ fail ]

        Test ended at 2017-08-10 12:36:03

CURRENT_TEST: gcol.innodb_virtual_debug_purge

--- /mnt/buildbot/build/mariadb-10.2.8/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result	2017-08-10 09:03:15.000000000 +0300

+++ /mnt/buildbot/build/mariadb-10.2.8/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.reject	2017-08-10 12:36:03.000000000 +0300

@@ -149,7 +149,7 @@

 connection default;

 select variable_value>1 from information_schema.global_status where variable_name='innodb_purge_trx_id_age';

 variable_value>1

-1

+0

 disconnect con1;

 start transaction with consistent snapshot;

 commit;

mysqltest: Result content mismatch