With the latest HEAD version I can successfully run autospec without any modifications.
I can't send SIGINT (ctrl-c) to an running autospec script. Ironruby will just exit to the command prompt but it leaves the command prompt in an invalid state because it still wants an answer to the question: Do you want to terminate the batch (Y/N)?
 
Expected results:
sending ctrl-c once should say: to quit the test run press ctrl-c again (or something to that effect). and after a 10s timeout or something it then restarts autospec so it picks up any new files on the file system.