CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (0);

# On connection 1
START TRANSACTION;
UPDATE t1 SET c1=1 WHERE c1=0;

# On connection 2
include/start_transaction_high_prio.inc
START TRANSACTION /* HIGH PRIORITY */;
UPDATE t1 SET c1=2 WHERE c1=0;
COMMIT;

# On connection 1
COMMIT;
ERROR HY000: Got error 149 - 'Lock deadlock; Retry transaction' during COMMIT
include/assert.inc ['There is a 2 in t1']
include/assert.inc ['There is no 1 in t1']
include/assert.inc ['There is no 0 in t1']
DROP TABLE t1;