allow inheriting from a Rails::Engine child

Which version of Rails did you try this on? Was it 3-0-stable branch or master?

A couple of months back or so I had noticed some chatter that there is still development going on in that area of Rails so that's why Rails didn't allow you to inherit from a Rails::Engine child. However I don't have any references so it's just speculative.

Also I think this discussion is better suited to the Rails Core group: http://groups.google.com/group/rubyonrails-core since it will get noticed better by the core members.

This issue has been automatically marked as stale because it has not been commented on for at least three months.

The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.

Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.