[GHC] #8740: Deriving instance conditionally compiles

[GHC]

#8740: Deriving instance conditionally compiles
-------------------------------------+-------------------------------------
              Reporter:              |            Owner:
  thomaseding                        |           Status:  new
                  Type:  bug         |        Milestone:
              Priority:  normal      |          Version:  7.6.3
             Component:  Compiler    |         Keywords:
  (Type checker)                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Unknown
      Operating System:              |       Blocked By:
  Unknown/Multiple                   |  Related Tickets:  #8128
       Type of failure:  GHC         |
  rejects valid program              |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by thomie):

 * os:  MacOS X => Unknown/Multiple
 * component:  Compiler => Compiler (Type checker)
 * related:   => #8128


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8740#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler