Changes to the type checker with respect to UndecidableInstances

Hi, I found a difference between GHC 7.6.3 and 7.8.3 with respect to UndecidableInstances. https://gist.github.com/maoe/57a4346eb36aee159916 https://gist.github.com/maoe/57a4346eb36aee159916 7.6.3 requires UndecidableInstances to compile this snippet whereas 7.8.3 doesn't. What has changed

Re: GHC 7.4.2 on Ubuntu Trusty

Resurrecting this thread: My impression was that Edward's suggestion was a simple and obvious solution to the problem of previous GHC versions quickly becoming orphaned and unbuildable. But Austin thought that this thread was stuck. Would Edward's suggestion be difficult to implement for any

Re: ANNOUNCE: GHC 7.10.1 Release Candidate 1

*From:* Austin Seipp mailto:aus...@well-typed.com *Sent:* ‎Tuesday‎, ‎December‎ ‎23‎, ‎2014 ‎15‎:‎36 *To:* ghc-d...@haskell.org mailto:ghc-d...@haskell.org, glasgow-haskell-users@haskell.org mailto:glasgow-haskell-users@haskell.org We are pleased to announce the first release candidate for GHC