innodb.purge_secondary_mdev-16222 failed in buildbot, debug sync point wait timed out

innodb.purge_secondary_mdev-16222 'innodb' w3 [ fail ]

        Test ended at 2019-08-21 09:26:19

CURRENT_TEST: innodb.purge_secondary_mdev-16222

--- D:/win32-debug/build/src/mysql-test/suite/innodb/r/purge_secondary_mdev-16222.result	2019-08-21 09:03:50.847375800 +0000

+++ D:\win32-debug\build\src\mysql-test\suite\innodb\r\purge_secondary_mdev-16222.reject	2019-08-21 09:26:18.243301400 +0000

@@ -13,9 +13,13 @@

 select * into outfile 'load.data' from t1;

 load data infile 'load.data' replace into table t1;

 set debug_sync= "now WAIT_FOR latch_released";

+Warnings:

+Warning	1639	debug sync point wait timed out

 set global debug_dbug= "-d,ib_purge_virtual_mdev_16222_1";

 drop table t1;

 set debug_sync= "now SIGNAL drop_started WAIT_FOR got_no_such_table";

+Warnings:

+Warning	1639	debug sync point wait timed out

 create table t1 (

 pk serial, vb tinyblob as (b) virtual, b tinyblob,

 primary key(pk), index (vb(64)))

mysqltest: Result length mismatch