`hidden` setting won't work for grape's default 404 handler

Hi.

I'm running an application which uses grape v1.1.0 and grape-swagger v0.27.3.
In my application I'm using grape's functionality for handling all 404's.

When I'm trying to access /swagger_doc I'm getting an undefined method '[]' for nil:NilClass error on GrapeSwagger::DocMethods::StatusCodes.get[route.request_method.downcase.to_sym].

The reason is obviously the missing request method as it is converted to * when using route(:any).
Since I don't even need the default 404 handler in my swagger documentation, I tried adding a hidden: true setting to the route (both in the description and using the route_setting method) but it doesn't seem to work.

Is there any way to get this working?
Thanks in advance.

Start with GrapeSwagger::DocMethods::StatusCodes.get and the route(:any) handling described in the report, then trace how route settings are read while generating /swagger_doc. Reproduce the nil request-method failure with the stated Grape and grape-swagger versions. Done means the default 404 route no longer causes documentation generation to fail when hidden: true is configured.