GeneralizedNewtypeDeriving regression in HEAD?

[Nathan Howell]

I can't file a trac ticket at the meny but wanted to see if this is a
bug... This is an excerpt from llvm-general that compiles on 7.6.3 but
doesn't without ImpredicativeTypes enabled on HEAD:
https://gist.github.com/NathanHowell/8138977

thanks,
-n
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/ghc-devs/attachments/20131226/fa191983/attachment.html>