mtl library in HEAD?
kathleen.fisher at gmail.com
Thu Sep 2 18:20:56 EDT 2010
Got it working. Thanks!
On Sep 2, 2010, at 12:44 AM, Don Stewart wrote:
>>> The library installs fine with earlier versions of Haskell. Is there
>>> something wrong with my installation, or is this a new
>>> incompatibility? If the latter, is a corrected version of the mtl
>>> library going to be available soon? Alternatively, how can I fix it?
>> Yes, this is a new incompatibility. The instance in question recently
>> moved from the mtl package to the base package, after discussion on this
>> Until the next release of ghc/base/mtl, it will be necessary to use the
>> HEAD versions of all of them (not merely the HEAD of ghc).
> And indeed ,the inverse patch has been applied to mtl,
> Fri Jul 30 17:40:34 CEST 2010 Ross Paterson <ross at soi.city.ac.uk>
> * move Monad and MonadFix instances for Either to base (proposal #4159)
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