Steps to reproduce:

1. Changes in configuration... upgrade from 3.5 to 4.0
2. ...

Result:
See screenshot...
See log file...

query [txnlev:0] [show tables like 'dbversion']
query [txnlev:0] [select mandatory,optional from dbversion]
current database version (mandatory/optional): 03050097/03050097
required mandatory version: 04000000
starting automatic database upgrade
query [txnlev:1] [begin;]
query [txnlev:1] [alter table `functions` change column `function` `name` varchar(12) default '' not null]
[Z3005] query failed: [1054] Unknown column 'function' in 'functions' [alter table `functions` change column `function` `name` varchar(12) default '' not null]
query [alter table `functions` change column `function` `name` varchar(12) default '' not null] failed, setting transaction as failed
query [txnlev:1] [rollback;]
database upgrade failed
End of DBcheck_version():FAIL

See memory dump...
Expected:
See screenshot....
See attached patch file...