Bug #18423 partition by hash cuts the results

Description:
A partition by hash loses results when using a WHERE condition involving the hash expression.

Similar to what reported in bug #18329. It is actually the same bug, but more general.

Example:

+----------------+
| version()      |
+----------------+
| 5.1.8-beta-log |
+----------------+
1 row in set (0.00 sec)

select * from part_tab_hash;
+------+------+------------+
| c1   | c2   | c3         |
+------+------+------------+
| 136  | abc  | 2002-01-05 |
| 158  | abc  | 2002-06-01 |
| 142  | abc  | 2002-02-14 |
| 162  | abc  | 2002-06-28 |
| 182  | abc  | 2002-11-09 |
| 184  | abc  | 2002-11-22 |
+------+------+------------+
6 rows in set (0.00 sec)

select * from part_tab_hash where c3 between '2002-01-01' and '2002-12-31';
+------+------+------------+
| c1   | c2   | c3         |
+------+------+------------+
| 182  | abc  | 2002-11-09 |
+------+------+------------+
1 row in set (0.00 sec)

How to repeat:
create database if not exists test;
use test;

drop table if exists part_tab_hash;
CREATE TABLE part_tab_hash
(   c1 int default NULL,
    c2 varchar(30) default NULL,
    c3 date default NULL
) engine=myisam
PARTITION BY hash (to_days(c3))
partitions 12;

INSERT INTO `part_tab_hash` VALUES
(136,'abc','2002-01-05'),
(142,'abc','2002-02-14'),
(162,'abc','2002-06-28'),
(182,'abc','2002-11-09'),
(158,'abc','2002-06-01'),
(184,'abc','2002-11-22');

select version();
select * from part_tab_hash;
select * from part_tab_hash where c3 between '2002-01-01' and '2002-12-31';

verified, test case attached

simplified test case

Attachment: bug18423.tar.gz (application/x-gzip, text), 715 bytes.

This bug has been fixed by previous bug patch in 5.1.10 or earlier

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

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Additional info:

Documented in 5.1.10 changelog. Closed.