Asset Pipeline + Stack Level to Deep

If you’re plagued by “SystemStackError: stack level too deep”:

1. Disable assets pipline(`config.assets.enabled = false`) in application.rb.
2. Don’t require `sass-rails` but instead require `sass` in Gemfile.

application.html.erb

<link href="/assets/application.css" media="screen" rel="stylesheet" type="text/css" />
<script src="/assets/application.js" type="text/javascript"></script>

config.ru

require ::File.expand_path('../config/environment',  __FILE__)

builder = Rack::Builder.new do
  map '/assets' do
    environment = Sprockets::Environment.new
    environment.append_path 'app/assets/javascripts'
    environment.append_path 'app/assets/stylesheets'
    run environment
  end

  map '/' do
    use Rack::FiberPool, :size => 6
    run YourApp::Application
  end
end

run builder