# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 21
    def initialize(app, routes_app = nil, response_format = :default, interceptors = self.class.interceptors)
      @app             = app
      @routes_app      = routes_app
      @response_format = response_format
      @interceptors    = interceptors
    end

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 16
    def self.register_interceptor(object = nil, &block)
      interceptor = object || block
      interceptors << interceptor
    end

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 28
    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