[Haskell-cafe] Building QuickCheck 2 Under GHC 6.10.1

[Don Stewart]

Indeed. The base3/base4 simultaneous install.

    http://haskell.org/haskellwiki/Upgrading_packages#runhaskell

Two solutions:

    cabal install quickcheck

(will determine the base dependency correct). or:

    runhaskell Setup.hs configure --constraint='base<4'

dominic.steinitz:
> Having been a happy user of QuickCheck 2 for many years, I now find it 
> won't build under ghc 6.10.1. Before I investigate further, has anyone 
> encountered this problem and has a fix?
> 
> Thanks, Dominic.
> 
> >C:\Users\Dom\QuickCheck>Setup build
> >Preprocessing library QuickCheck-2.0...
> >Building QuickCheck-2.0...
> >[2 of 9] Compiling Test.QuickCheck.Exception ( 
> >Test\QuickCheck\Exception.hs, dis
> >t\build\Test\QuickCheck\Exception.o )
> >
> >Test\QuickCheck\Exception.hs:12:31:
> >    Class `Exception' used as a type
> >    In the type `Exception'
> >    In the type `Either Exception a'
> >    In the type `IO (Either Exception a)'
> >
> >Test\QuickCheck\Exception.hs:15:36:
> >    Class `Exception' used as a type
> >    In the type `Exception'
> >    In the type `Either Exception a'
> >    In the type `IO (Either Exception a)'
> 
> 
> 
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