Bug #16779 crash server UNION and SUM

Description:
this query crash server : (SELECT McoCsog,SUM(McoImpi) FROM Movcon GROUP BY McoCsog) UNION (SELECT McoCccf,SUM(McoImpi) FROM Movcon GROUP BY McoCccf)

How to repeat:
this query crash server : (SELECT McoCsog,SUM(McoImpi) FROM Movcon GROUP BY McoCsog) UNION (SELECT McoCccf,SUM(McoImpi) FROM Movcon GROUP BY McoCccf)

Could you please provide the dump script for table creation and some
inserts if needed for to run the query?

Thanks in advance.

attach text file Thanks for help.

Attachment: Movcon.txt (text/plain), 7.91 KiB.

No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".

Movcon.txt

Attachment: Movcon.txt (text/plain), 7.91 KiB.

please help

Works fine on 5.0.19/5.0.20

mysql> (SELECT McoCsog,SUM(McoImpi) FROM Movcon GROUP BY
    -> McoCsog) UNION (SELECT McoCccf,SUM(McoImpi) FROM Movcon GROUP BY McoCccf);
+----------+--------------+
| McoCsog  | SUM(McoImpi) |
+----------+--------------+
| 01010101 | 6000         |
| 03020106 | 12000        |
| 03020301 | 200          |
| 03040301 | 600          |
| 08040101 | 2000         |
| 50010101 | 16000        |
| 51020104 | 1000         |
| C01      | 36000        |
| F01      | 1800         |
|          | 37800        |
| 03020101 | 36000        |
| 08030101 | 1800         |
+----------+--------------+
12 rows in set (0.05 sec)

mysql> select version();
+-----------+
|           |
+-----------+
| 5.0.19-nt |
+-----------+
1 row in set (0.00 sec)