[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:
        Blocking:                    |  Related Tickets:  #8541
-------------------------------------+------------------------------------
Changes (by nomeata):

 * related:   => #8541


Comment:

 See #8541 for a ticket discussing poly-kind `Coercible`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8503#comment:20>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler