[GHC] #10524: PolyKinds doesn't interact well with DeriveFunctor

[GHC]

#10524: PolyKinds doesn't interact well with DeriveFunctor
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        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10561            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I also experienced the same error as in comment:15 when I tried to derive
 a `Generic1` instance for `Compose` in Phab:D1543. A workaround is to use
 standalone deriving:

 {{{#!hs
 deriving instance Functor f => Generic1 (Compose f g)
 }}}

 If we fix this bug, we should remember to change that instance (located
 [http://git.haskell.org/ghc.git/blob/e0e03d5b9d5cd678f6402534451964d491f16540:/libraries/base/Data/Functor/Compose.hs#l41
 here]).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10524#comment:16>
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