Bug #18753 Partitions: auto_increment fails

Description:
If I create a LIST partition with an auto_increment
column, and then I try to insert into the table, I
succeed the first two times, but fail the third time.
Possibly the underlying cause is the same as for Bug#18552.

How to repeat:
mysql> create table tp78 (s1 int auto_increment primary key) partition by list (s1) (partition p1 values in (1), partition p2 values in (2), partition p3 values in (3));
Query OK, 0 rows affected (0.02 sec)

mysql> insert into tp78 values (null);
Query OK, 1 row affected (0.00 sec)

mysql> insert into tp78 values (null);
Query OK, 1 row affected (0.00 sec)

mysql> insert into tp78 values (null);
ERROR 1022 (23000): Can't write; duplicate key in table 'tp78'

Thank you for the bug report.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/4550

The patch works I am pretty sure. I'm slightly worried that it's performance isn't
the best but on the other hand I presume this is the only really safe way.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/4726

Fixed in 5.1.10

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.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

Documented bugfix in 5.1.10 changelog. Closed.