Hi,<div><br></div><div>There is also this nice trick to use Debug.Trace:</div><div><br></div><div>merge xs ys | trace (show (xs,ys)) False = undefined -- add this as the first case to merge</div><div>mergesort xs | trace (show xs) False = undefined -- and this as the first case to mergesort<br>

<br>HTH,</div><div>Ozgur<br>
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