Ruby 1.9.1 with rspec "can't modify frozen object"

Question

I just updated to Ruby 1.9.1 and nearly all my rspec are broken giving me a "can't modify frozen object". Even the Rspec sample code from a generate rspec_controller fails.

RuntimeError in 'DownloadsController should use DownloadsController'
can't modify frozen object                                                                                                                                                          
/usr/local/lib/ruby19/1.9.1/timeout.rb:44:in `timeout'


Generated by the following code: 

it "should use DownloadsController" do
  controller.should be_an_instance_of(DownloadsController)
end

Can anyone help ?

Answer 1

Are you use you aren't trying to stub something that is nil.

In 1.8 nil wasn't frozen. It is however frozen in ruby 1.9.