This is a sample app to reproduce the bug for rails bug #2182 It uses a local copy of rails, on the 3-1-stable branch, to create the project So to run this project on your local, you will either have to edit the Gemfile entry for rails to an installed gem or a local copy of rails on the 3-1-stable branch Had last checked this on commit sha 787f1f30009daafa15d3f4c4ac3c50459fd8e57f. This is on branch 3-1-stable The error backtrace is on https://gist.github.com/1102147 The rails log errors are filtered to be less verbose so i ran a asset:precompile rake task The rails issue is at rails/rails#1732 == Log Right now there are two separate components, sprockets and action_view. Also, sprockets uses Tilt while action_view does not. Ideally i think, action_view should use tilt more and the whole sprockets thing should be a rendering strategy of ActionView I am trying to solve the problem by figuring out how to render a template from say a rake task Previously, i tried to register_processor for sprockets, but that did not make sense Also, sprockets has rudimentary templating, it reads a constant.yml file and uses erb syntax aka. <%= VAR_KEY %> to render the config set in constants.yml