[Haskell-cafe] Problem with class Control.Monad.Error noMsg usage
ross at soi.city.ac.uk
Tue Dec 21 23:03:27 CET 2010
On Tue, Dec 21, 2010 at 03:28:22PM +0000, Aaron Gray wrote:
> I have been trying to build the Scheme in 24 Hours on WikiBooks :-
> But I am getting an error :-
> scheme.hs:289:6: `noMsg' is not a (visible) method of class `Error'
> `strMsg' is not a (visible) method of class `Error'
I don't get that here. Perhaps you're using an old version of monads-fd
(0.1.0.0). I'd recommend installing mtl-126.96.36.199 instead.
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