instance method call

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 30
    def call(env)
      _, headers, body = response = @app.call(env)

      if headers[Constants::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
      request = ActionDispatch::Request.new env
      backtrace_cleaner = request.get_header("action_dispatch.backtrace_cleaner")
      wrapper = ExceptionWrapper.new(backtrace_cleaner, exception)

      invoke_interceptors(request, exception, wrapper)
      raise exception unless wrapper.show?(request)
      render_exception(request, exception, wrapper)
    end