[Haskell-cafe] Missing Functor instances in GHC 7?

[Sebastian Fischer]

On Fri, 2010-12-10 at 08:33 +0000, Simon Peyton-Jones wrote:
> If there's a consensus that the behaviour is wrong, or at least
> unexpected, would you like to make a reproducible test case and file a
> ticket? 

I took Erik's mail as indicator that the behaviour of GHCi is
inconsistent and unexpected:

    http://hackage.haskell.org/trac/ghc/ticket/4832

Sebastian