Celluloid thread local issues?

celluloid_thread_local_issues.rb

# Just so I'm clear on the issue...

class Donut < ActiveRecord::Base
  # ...
end

# This encounters the issue with fiber-local variables...
class Homer
  include Celluloid

  def initialize; @donuts = []; end
  def buy_a_donut(id); @donuts << Donut.find(id); end
  def eat_donuts; @donuts.each{|donut| donut.eaten = true; donut.save }; end

end

# But this doesn't?
class Homer
  include Celluloid

  def buy_and_eat_a_donut(id); Donut.find(id).tap{|donut| donut.eaten = true; donut.save }; end
end