[Haskell-cafe] RE: Typing problems with basic arithmetic - help!

Scherrer, Chad Chad.Scherrer at pnl.gov
Sat Sep 24 13:47:43 EDT 2005

> For some reason the following code is producing an error 
> message from ghci that the the patterns are non-exhaustive. 
> Does anyone have any idea why that could be, given that the 
> patterns are, at least in my meaning, provably exhaustive?

You forgot to match against the empty list. Try adding 
choosenonuniqueset n [] = []

-Chad Scherrer

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