Hello,
we are working on a very large project called Hets (heterogenous tool
set) where we encounterd two related errors in ghc, which disappear when
we start over the compilation at that point where the compilation
stopped
due to one of that errors. We certainly use the current version 6.2.1 of
You will have to give both the errors and the source code...
I have done quite a bit with classes and GHC's constraint
inferance is pretty good.
The chances are you really do need to add some extra
constraints...
(by the way if you are working with heterogeneous collections,
you may be
