handler_for_rescue

# File activesupport/lib/active_support/rescuable.rb, line 102
      def handler_for_rescue(exception, object: self) #:nodoc:
        case rescuer = find_rescue_handler(exception)
        when Symbol
          method = object.method(rescuer)
          if method.arity == 0
            -> e { method.call }
          else
            method
          end
        when Proc
          if rescuer.arity == 0
            -> e { object.instance_exec(&rescuer) }
          else
            -> e { object.instance_exec(e, &rescuer) }
          end
        end
      end