# File lib/capybara/server.rb, line 14
      def call(env)
        if env["PATH_INFO"] == "/__identify__"
          [200, {}, [@app.object_id.to_s]]
        else
          begin
            @app.call(env)
          rescue StandardError => e
            @error = e unless @error
            raise e
          end
        end
      end