Jørgen Hermanrud Fjeld <[EMAIL PROTECTED]> writes:
> I have a generated Haskell program that emits a
> "Fail: <<loop>>"
> at runtime.
> Are there some tools or standard manner for identifying the lines that
> participate in the loop?
Provided your program does not use too many GHC extensions or fancy
libraries, you could try using the Hat tracer
http://haskell.org/hat
which now comes with two tools called 'hat-nonterm' and 'black-hat',
specially designed for finding the cycle that leads to a black hole
or non-termination.
Regards,
Malcolm
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