Comment 2 for bug 662714

The problem can be repeated with a simpler test case that does not involve replication:

--source include/have_pbxt.inc
CREATE TABLE t1 (a INT, b INTEGER AUTO_INCREMENT PRIMARY KEY, c INT) ENGINE=pbxt;
INSERT INTO t1 VALUES (100, NULL, 100), (100, NULL, 100);
BEGIN;
--error 1062
UPDATE t1 SET b = 20 WHERE a > 3 LIMIT 6;
SELECT * FROM t1 ORDER BY b;
COMMIT;
SELECT * FROM t1 ORDER BY b;
DROP TABLE t1;
DROP DATABASE pbxt;

The failing update is not rolled back as it should be; it leaves the primary key of the first row changed from 2 to 20.