Arel gives invalid SQL for empty array

ActiveRecord <= 2.3 accepts an empty array as a condition on an attribute, but Arel turns it into invalid SQL:

User.all( :conditions => { :id => [] } )

ActiveRecord::StatementInvalid: Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')))' at line 1: SELECT * FROM users WHERE ((users.id IN ()))