LP:778434 - Wrong result with in_to_exists=on in maria-5.3-mwl89

Not repeatable with maria-5.3. The following query:

SELECT * FROM t1 INNER JOIN t2 ON t2.f10 = t1.f11
WHERE (6, 234) IN (
SELECT t3.f1, t3.f1
FROM t3 JOIN t4 ON t4.f11 = t3.f10
);

returns rows even though there is no value of 234 in the database and therefore there is no way for the IN predicate to be TRUE.

EXPLAIN:

id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
1 PRIMARY t2 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t3 const PRIMARY PRIMARY 4 const 1 Using index condition
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 21 Using where; Using join buffer (flat, BNL join)

test case:

CREATE TABLE t1 ( f11 int) ;
INSERT IGNORE INTO t1 VALUES (0);

CREATE TABLE t2 ( f10 int) ;
INSERT IGNORE INTO t2 VALUES (0);

CREATE TABLE t3 ( f1 int NOT NULL , f10 int, PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t3 VALUES (6,0),(10,0);

CREATE TABLE t4 ( f11 int) ;
INSERT IGNORE INTO t4 VALUES
(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(NULL),
(0),(0),(0),(0),(0),(0),(0),(0),(0),(0);

SET SESSION optimizer_switch='materialization=off,in_to_exists=on,subquery_cache=off,semijoin=off';

SELECT * FROM t1 INNER JOIN t2 ON t2.f10 = t1.f11
WHERE (6, 234) IN (
SELECT t3.f1, t3.f1
FROM t3 JOIN t4 ON t4.f11 = t3.f10
);