How can I explicitly redirect to an automatically-generated `error` route?

It seems I can explicitly visit/redirect to an auto-created loading route, but not an error route. Is there any reason for this? Or way to work around it?

By "auto-created", I mean I have created loading and error templates, but haven't explicitly created routes or defined them in the router. The Ember docs explain that this will create a loading route, and implies (but does not explicitly state) that the same should be true for error routes.

The error I'm seeing looks as though the route doesn't exist:

DEBUG: -------------------------------
vendor.js:28585DEBUG: Ember      : 1.8.1
vendor.js:28585DEBUG: Ember Data : 1.0.0-beta.12
vendor.js:28585DEBUG: Handlebars : 1.3.0
vendor.js:28585DEBUG: jQuery     : 1.11.2
vendor.js:28585DEBUG: -------------------------------
vendor.js:28585Error: Assertion Failed: The URL '/error' did not match any routes in your application
    at new Error (unknown source)
    at Error.EmberError (http://ift.tt/1ErrDq7)
    at Object.assert (http://ift.tt/1G3x2Cv)
    at http://ift.tt/1ErrALd
    at tryCatch (http://ift.tt/1G3x0uh)
    at invokeCallback (http://ift.tt/1ErrDqe)
    at http://ift.tt/1G3x0uj
    at http://ift.tt/1ErrDGG
    at http://ift.tt/1G3x2SQ
    at Object.flush (http://ift.tt/1ErrDql)
vendor.js:17077Uncaught Error: Assertion Failed: Error: Assertion Failed: The URL '/error' did not match any routes in your application

But it is listed as an available route:

Ember.keys(Onboarding.Router.router.recognizer.names)
["loading", "error", ..., "index", "application"]

Despite this, explicitly adding it to the router:

Router.map(function() {
  ...
  this.route("error");
});

does fix the issue.

Am I doing something silly? Or is this intended behavior?