innodb.deadlock_detect failed in buildbot

innodb.deadlock_detect 'innodb'          w4 [ fail ]

        Test ended at 2017-07-04 08:46:49

CURRENT_TEST: innodb.deadlock_detect

mysqltest: At line 44: query 'reap' succeeded - should have failed with errno 1205...

The result from queries just before the failure was:

< snip >

id	INT,

PRIMARY KEY(id)

) ENGINE=InnoDB;

INSERT INTO t1 VALUES(1), (2), (3);

BEGIN;

SELECT * FROM t1 WHERE id = 1 FOR UPDATE;

id

1

connect  con1,localhost,root,,;

BEGIN;

SELECT * FROM t1 WHERE id = 2 FOR UPDATE;

id

2

SELECT * FROM t1 WHERE id = 1 FOR UPDATE;

connection default;

SELECT * FROM t1 WHERE id = 2 FOR UPDATE;

connection con1;

ERROR HY000: Lock wait timeout exceeded; try restarting transaction

ROLLBACK;

connection default;

More results from queries before failure can be found in /run/shm/var/4/log/deadlock_detect.log