On Thu, 2008-12-18 at 20:09 +0000, Thomas Schilling wrote:
This bug appears to be fixed in QuickCheck 2. However, for some reason cabal-install by default only installs 1.2. You have to explicitly ask for the newer version:
$ cabal install QuickCheck-2.1.0.1
Or more generally: $ cabal install 'quickcheck >= 2' so you don't have to know exactly which version. I'm not quite sure what to do about these cases where we've added a global preference to keep old packages working but where it conflicts with the principle of least surprise. We don't necessarily want to just ignore the preference when the user asks for it on the command line because that prevents maintainers using it to allow stable and experimental versions of a package to be on hackage simultaneously. However QuickCheck seems to be a case where people now expect to use QC-2, but old packages that don't specify a version typically only work with QC-1.x. Duncan