Re: GADT Type Checking GHC 6.10 versus older GHC

Simon Peyton-Jones wrote:

| > I also feel that the type errors given when working with existential | > types, especially GADTs with existentials, are confusing. I think | | I am using existential types to test GADT code. See | http://www.haskell.org/haskellwiki/QuickCheck_/_GADT which no longer | works with 6.10.1.

Really? I've just compiled that entire page with 6.10.1, and it was fine, except that I had to add a type signature for prettyRep. No problems there.

Simon

Sorry I inadvertently used an old copy of ghc. Dominic.