patch applied (ghc): Reject foralls in constructor args in 'deriving', except for Functor etc

[Simon Peyton Jones]

Mon Mar 16 09:45:02 PDT 2009  simonpj at microsoft.com
  * Reject foralls in constructor args in 'deriving', except for Functor etc
  Ignore-this: 2538aee2634fb587d74a8dc1a064cb5b

    M ./compiler/typecheck/TcDeriv.lhs -24 +36

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20090316164502-1287e-4f3acdf55b461445d78480686297bbe936d745f7.gz