ActionController::RoutingError raised with incorrect message if route points to missing class

[trek]

When a route points to an unimplemented controller, ActionController::RoutingError is raised with a message No route matches ..., although the route does exist and match.

MyApp::Application.routes.draw do
  root :to => 'welcome#index'
end

and example spec that fails with misleading error:

describe "welcome" do
  it "GET / -> welcome#show" do
    { :get => "/" }.should route_to(:controller => "welcome", :action => 'index')
  end
end

[bennytheshap]

Yes, please fix this. It always makes me crazy.

[trek]

I'm closing this issue in favor of #2549, which includes a patch