Unclear route error thrown when an invalid object is passed to a "_path" method

Assuming that we have the following resources at config/routes.rb:

... resources :users do
reousrces :posts end
...

So, somewhere in a view, I would use the link_to method:

link_to 'Go!', user_posts_path(@anything)

Assuming that the @anything is invalid, Rails throws a very unclear error about the route:

"ActionController::RoutingError in Welcome#index"

In my opinion, it should first throw an error saying that the passed parameter is not valid, because the route exists, but only the parameter is invalid.

I can provide further details for you to reproduce this scenario.