Re: ghc-7.10.0 type inference regression when faking injective type families

I've added it as https://ghc.haskell.org/trac/ghc/ticket/10009 On Tue, Jan 20, 2015 at 11:23 AM, Richard Eisenberg wrote:

After quite a bit of thought, I agree that this is a regression and that the original program should be accepted.

Make a bug report!

Thanks, Richard