[GHC] #8740: Deriving instance conditionally compiles (was: Code conditionally compiles)

[GHC]

#8740: Deriving instance conditionally compiles
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        Reporter:  thomaseding                |            Owner:
            Type:  bug                        |           Status:  new
        Priority:  normal                     |        Milestone:
       Component:  Compiler                   |          Version:  7.6.3
      Resolution:                             |         Keywords:
Operating System:  MacOS X                    |     Architecture:
 Type of failure:  GHC rejects valid program  |  Unknown/Multiple
       Test Case:                             |       Difficulty:  Unknown
        Blocking:                             |       Blocked By:
                                              |  Related Tickets:
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8740#comment:1>
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