我正在尝试运行Heckle，并且我一直收到错误：
> spec spec/controllers/my_controller_spec.rb --heckle MyController
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!! exception= has a thick skin. There's nothing to heckle.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
(Runs through several mutations...)
/home/developer/.gem/ruby/1.8/gems/heckle-1.4.3/lib/heckle.rb:603:in `current_code': undefined method `translate' for Ruby2Ruby:Class (NoMethodError)
有什么想法吗？
编辑：我忘记了宝石版本：
heckle (1.4.3)
ruby2ruby (1.2.3)
rails (2.3.2, 2.2.2)
rspec (1.2.6)
rspec-rails(1.2.6, 1.1.12)