I am running jruby 9.0.5.0 in the official docker image and I just upgraded to rails 5 and devise 4.0.0.rc1 and am working through a bunch of issues, one being that I can not start my app without getting an error such as the one below

! Unable to load application: LoadError: load error: /usr/src/app/app/models/user -- java.lang.NullPointerException: null
LoadError: load error: /usr/src/app/app/models/user -- java.lang.NullPointerException: null

As soon as I remove the following line from my User Model

`devise :database_authenticatable, :registerable,:recoverable, :rememberable, :trackable, :validatable

I can start my application but obviously its horribly broken and cant serve the login page as devise isn't initiated properly!

Any help would be much appreciated