Redmine

If URI contains a port, I cannot redirect to back_url after login.

If back_uri contains port, ApplicationController#validate_back_url raises Addressable::URI::InvalidURIError and returns false.
So, hidden field of back_url is not rendered at '/login'.
The validation method should remove the port before the host.

       [:scheme, :host, :port].each do |component|                                                                                                                                                       
         if uri.send(component).present? && uri.send(component) != request.send(component)
           return false
         end

         uri.send(:"#{component}=", nil) # => raises InvalidURIError
       end