There was an issue if you named a relation something like 'group' it would throw a weird non-helpful error that would make you triage the bug for a while.
You can now set the database connection (for instance in a long running cron and you need to refresh the connection)
You can now evaluate the the SQL that was compiled
There was a bug introduced with __isset() being created where the $this->join property was being dynamically set.
__isset()
being created where the$this->join
property was being dynamically set.