Comment 4 for bug 392236

A backport of 5.0.38 doesn't produce a mysqld crash:

mathiaz@t-mysqld-d:~$ mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.0.38-Ubuntu_0ubuntu1-log Ubuntu 7.04 distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> SELECT * FROM (SELECT mu.User FROM mysql.user mu UNION SELECT mu.user FROM mysql.user mu ORDER BY mu.User) a;
ERROR 1054 (42S22): Unknown column 'mu.User' in 'order clause'