Celluloid registry issue/weirdness

celluloid_registry_issue.rb

require 'celluloid'
require 'awesome_print'

Celluloid.logger = Logger.new STDOUT

class Monitor
  include Celluloid
  
  attr_reader :name
  
  def initialize(name)
    @name = name
  end
end

class Manager
  include Celluloid
  
  def initialize
    @names = [
      'Paul',
      'John',
      'Ringo'
    ]
    
    spawn_actors
    every(5) { ap whos_there }
    
    after(10) { killall_monitors }
  end
  
  def spawn_actors
    @names.each do |name|
      Supervisor.supervise_as(actors_name(name), Monitor, name)
    end
  end
  
  def killall_monitors
    @names.each do |name|
      Celluloid::Actor[actors_name(name)].tap do |actor|
        actor.terminate if actor.alive?
      end
    end
  end
  
  def whos_there
    Celluloid::Actor.registered
  end
  
  private
  
  def actors_name(name)
    :"Monitor#{name}"
  end
end

Celluloid::SupervisionGroup.new do |group|
  group.supervise_as :Manager, Manager
end

sleep