[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 4 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 4 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 4 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 5 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 5 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 5 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 6 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 6 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 6 -- OK
[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 7ackermann.ruby:7:in `ack': stack level too deep (SystemStackError)
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	 ... 721 levels...
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:17
 -- FAIL
	(premature end-of-file)

[RUN] c:\ruby\bin\ruby.exe ackermann.ruby 8ackermann.ruby:8:in `ack': stack level too deep (SystemStackError)
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	 ... 724 levels...
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:12:in `ack'
	from ackermann.ruby:17
 -- FAIL
	(premature end-of-file)