Family instance consistency

[Simon Peyton Jones]

Edward
Could you possibly take a look at #14396?   It's going to bite us soon, as Alan's Trees That Grow patch lands (see the branch mentioned on the ticket).
(In fact, Alan, I don't know how you build that branch ; I can't build it.)
Simon
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20171027/fb77f9bd/attachment-0001.html>