rails/rails — pull request #17111 by AvnerCohen (2014-09-30 10:35:00+00:00)
Title: Better error message in case of miss use of a  match instruction

As part of a migration of a large project from Rails 3 to Rails 4.
Think 1K LOC in routes.rb and multiple gems that add their own routes, I suggest adding a more specific info into why this ````ArgumentError```` was raised.