[GHC] #8503: New GeneralizedNewtypeDeriving check still isn't permissive enough

[GHC]

#8503: New GeneralizedNewtypeDeriving check still isn't permissive enough
-------------------------------------+------------------------------------
        Reporter:  goldfire          |            Owner:  goldfire
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.7
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  8548
        Blocking:                    |  Related Tickets:  #8541
-------------------------------------+------------------------------------

Comment (by nomeata):

 Ok, pushed. Closing this ticket (is is far too long anyways, and trac
 spends too much time generating it), so any new issues with `Coercible` or
 GND please in new tickets.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8503#comment:41>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler