call

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 14
    def call(env)
      begin
        response = @app.call(env)

        if response[1]['X-Cascade'] == 'pass'
          body = response[2]
          body.close if body.respond_to?(:close)
          raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
        end
      rescue Exception => exception
        raise exception if env['action_dispatch.show_exceptions'] == false
      end

      exception ? render_exception(env, exception) : response
    end