mtr failure: innodb.deadlock_wait_thr_race

CURRENT_TEST: innodb.deadlock_wait_thr_race

mysqltest: At line 61: query 'reap' failed: ER_LOCK_WAIT_TIMEOUT (1205): Lock wait timeout exceeded; try restarting transaction

The result from queries just before the failure was:

< snip >

SET TRANSACTION ISOLATION LEVEL READ COMMITTED;

SET DEBUG_SYNC = 'lock_trx_handle_wait_enter SIGNAL upd_locked WAIT_FOR upd_cont';

SET DEBUG_SYNC = 'trx_t_release_locks_enter SIGNAL sel_cont WAIT_FOR upd_cont_2';

BEGIN;

UPDATE t SET b = 100;

connection default;

SET DEBUG_SYNC="now WAIT_FOR upd_locked";

SET DEBUG_SYNC="deadlock_report_before_lock_releasing SIGNAL upd_cont WAIT_FOR sel_cont";

SET DEBUG_SYNC="lock_wait_before_suspend SIGNAL sel_before_suspend";

SELECT * FROM t WHERE a = 10 FOR UPDATE;;

connect con_3,localhost,root,,;

SET DEBUG_SYNC="now WAIT_FOR sel_before_suspend";

Warnings:

Warning	1639	debug sync point wait timed out

SET DEBUG_SYNC="now SIGNAL upd_cont_2";

disconnect con_3;

connection con_2;

ERROR 40001: Deadlock found when trying to get lock; try restarting transaction

disconnect con_2;

connection default;

More results from queries before failure can be found in D:\Buildbot\amd64-windows\build\mysql-test\var\12\log\deadlock_wait_thr_race.log