call

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 16
    def call(env)
      _, headers, body = response = @app.call(env)

      if headers['X-Cascade'] == 'pass'
        body.close if body.respond_to?(:close)
        raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
      end

      response
    rescue Exception => exception
      raise exception if env['action_dispatch.show_exceptions'] == false
      render_exception(env, exception)
    end