aliasing methods stack level too deep issue when a module is included more than once

this_does_not_work.rb

module M
  def self.included(base)
    base.class_eval do
      alias_method :user_without_name, :user
      alias_method :user, :user_with_name
    end
  end

  def user
    puts "in user"
  end

  def user_with_name
    puts "in user_with_name"
    user_without_name || "foo"
  end
end

class A
  include M
end

A.new.user
A.class_eval { include M } 
A.new.user # stack-level too deep

this_works.rb

module M
  def self.included(base)
    base.class_eval do
      def user
        puts "in user"
      end

      def user_with_name
        puts "in user_with_name"
        user_without_name || "foo"
      end

      alias_method :user_without_name, :user
      alias_method :user, :user_with_name
    end
  end
end

class A
  include M
end

A.new.user
A.class_eval { include M } 
A.new.user