callbacks.rb

      def call(*args, &block)
        evaluate_method(method, *args, &block) if should_run_callback?(*args)
      rescue LocalJumpError => e
        puts method.inspect
        puts args.inspect
        puts e.backtrace.inspect
        raise ArgumentError,
          "Cannot yield from a Proc type filter. The Proc must take two " +
          "arguments and execute #call on the second argument."
      end