Incorrect Join Execution When Controlling Outer Join Operations

CREATE TABLE `t1` (
`c0` char(100) DEFAULT NULL,
KEY `ic0` (`c0`)
);
INSERT INTO `t1` VALUES ('!n0-dZx*'),('1678835511'),('E'),('QZI');

CREATE TABLE `t2` (
`c0` varchar(100) DEFAULT NULL,
`c1` char(100) DEFAULT NULL,
UNIQUE KEY `c0` (`c0`)
);
INSERT INTO `t2` VALUES ('-145500836','\n'),('^U?N','');

CREATE TABLE `t3` (
`c0` char(100) NOT NULL,
`c1` varchar(100) DEFAULT NULL,
PRIMARY KEY (`c0`)
);
INSERT INTO `t3` VALUES ('','
1idpE'),('-323326722','');

mysql> SELECT t3.c0 FROM t1 CROSS JOIN t2 LEFT OUTER JOIN t3 ON t2.c1 = t3.c1 WHERE (t1.c0 IN ((t2.c0 REGEXP t2.c1), t2.c0));
------

------

------
3 rows in set, 6 warnings (0.00 sec)

mysql> SET optimizer_switch='outer_join_with_cache=off';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT t3.c0 FROM t1 CROSS JOIN t2 LEFT OUTER JOIN t3 ON t2.c1 = t3.c1 WHERE (t1.c0 IN ((t2.c0 REGEXP t2.c1), t2.c0));
------------

------------

------------
4 rows in set, 6 warnings (0.01 sec)