discourse/discourse — pull request #162 by jessepollak (2013-02-14 20:05:08+00:00)
Title: Adds failure callback for omniauth

Prior to this commit, one omniauth failure (i.e. when a user clicks to log in with facebook, then denies authentication on Facebook's side), the user was redirected to a 404 page.

This commit adds a route to handle this situation with the proper error message.