FR: Error on failed import

It would be cool if there was a console log telling me when my import failed. I've accidentally typed in the wrong path and scratched my head why the tag wasn't rendering.

This should show up as a 404. Is that not sufficient?

I actually don't recall the context of why I filled this, but 404ing should be sufficient. I'm assuming nested imports 404 as well and should point me to the failed import.