log_error

# File actionpack/lib/action_controller/metal/live.rb, line 372
      def log_error(exception)
        logger = ActionController::Base.logger
        return unless logger

        logger.fatal do
          message = +"\n#{exception.class} (#{exception.message}):\n"
          message << exception.annotated_source_code.to_s if exception.respond_to?(:annotated_source_code)
          message << "  " << exception.backtrace.join("\n  ")
          "#{message}\n\n"
        end
      end