Wrong result of MIN(time_expr) and MAX(time_expr) with GROUP BY

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (i INT, d TIME);

INSERT INTO t1 VALUES (1,'10:20:30');

INSERT INTO t1 VALUES (1,'100:20:20');

SELECT MIN(d), MAX(d) FROM t1;

SELECT i, MIN(d), MAX(d) FROM t1 GROUP BY i;

+----------+-----------+

| MIN(d)   | MAX(d)    |

+----------+-----------+

| 10:20:30 | 100:20:20 |

+----------+-----------+

+------+-----------+----------+

| i    | MIN(d)    | MAX(d)   |

+------+-----------+----------+

|    1 | 100:20:20 | 10:20:30 |

+------+-----------+----------+

void Item_sum_min_max::update_field()

{

...

    switch (Item_sum_min_max::type_handler()->cmp_type()) {

    case STRING_RESULT:

    case TIME_RESULT:

      min_max_update_str_field();