Futures interface silent death repro?

mula.rb

class Muile

  include Celluloid

  def router method, *args
    puts "Called Muile.#{method}"
    if respond_to? "#{method}!"
      puts "Calling Muile.#{method}!"
      send "#{method}!", *args
    else
      raise "No method found in Muile for #{method}"
    end
  end
  
  def work! job
    puts "Muile.work!"
    #de do job..
  end
  
end

module Mula

  @muile = Muile.pool( size: 9 )
  
  def self.method_missing( method, *args )
    puts "Mula.#{method}"
    #de .. pre-initializations
    @muile.future.router method, *args
  end
  
end

puts "starting..."
Mula.work #de silently dies?
puts "...finished"