# File lib/new_relic/agent/error_collector.rb, line 127
      def tag_exception(exception)
        return if exception_is_java_object?(exception)
        return if exception.frozen?
        begin
          exception.instance_variable_set(EXCEPTION_TAG_IVAR, true)
        rescue => e
          NewRelic::Agent.logger.warn("Failed to tag exception: #{exception}: ", e)
        end
      end