Edward,
What version of the packages are you using? Can you give the output of:
ghc-pkg list|grep failure
Michael
On Thu, Dec 31, 2009 at 7:11 AM, Edward Z. Yang
Excerpts from Alexander Dunlap's message of Thu Dec 31 00:06:58 -0500 2009:
Why are you importing both Control.Failure and Control.Monad.Failure when the latter just re-exports the former? Are you using the latest versions of the two packages? Try importing just Control.Monad.Failure.MTL; that provides the MTL failure instances and also re-exports Control.Failure.
That's correct. I imported both when Control.Monad.Failure.MTL failed to expose try:
ezyang@javelin:~/Dev/wizard$ ghci Prelude> :m +Control.Monad.Failure.MTL Prelude Control.Monad.Failure.MTL> :t try
<interactive>:1:0: Not in scope: `try'
Which, doesn't really seem like it should be the case.
Cheers, Edward _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe