log_error

# File actionpack/lib/action_controller/metal/live.rb, line 302
    def log_error(exception)
      logger = ActionController::Base.logger
      return unless logger

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