AR::Relation.select does not remove calculated attributes

[lowjoel]

Reducing my use case (not really tested, let me know if this needs clarification)

class SomeModel < ActiveRecord::Base
  has_many :children
  calculated :some_attribute, -> { ... }
  scope :with_other_model do
    select(:id)
  end

  default_scope { calculated(:some_attribute }
end

# Usage:
SomeModel.with_other_model # => SELECT id, (...) AS some_attribute ...

This affects the ability to use a scope with calculated attributes as a subquery. I'd imagine the calculated attributes would need to be removed if a select is applied onto the scope.