If the HAVING clause contains a redundant clause, e.g. "t1.f1 AND t1.f1", it is not observed and rows are returned for which f1 = 0

reproducible in maria-5.3 , maria-5.3-wl128. Not reproducible in maria-5.2 and mysql 5.5.8

EXPLAIN:

id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 Using where; Using filesort
1 SIMPLE t2 ref f1 f1 5 test.t1.f2 1 Using index

test case:

--source include/have_innodb.inc

CREATE TABLE t2 ( f1 int(11), KEY (f1)) ENGINE=InnoDB;
CREATE TABLE t1 ( f2 int(11), f1 int(11), PRIMARY KEY (f2), KEY (f1)) ENGINE=InnoDB;

INSERT IGNORE INTO t1 VALUES (18,0),(9,10),(8,11),(2,15),(7,19),(1,20);

SET SESSION join_cache_level = 0;
SELECT t1.f1 FROM t1 LEFT JOIN t2 FORCE KEY (f1) ON t1.f2 = t2.f1 WHERE t1.f2 >= 6 HAVING t1.f1 AND t1.f1 ORDER BY t1.f1;

returns:

f1
0
10
11
19