[GHC] #8128: Standalone deriving fails for GADTs due to inaccessible code

[GHC]

#8128: Standalone deriving fails for GADTs due to inaccessible code
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              Reporter:  adamgundry  |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.7
  (Type checker)                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  GHC         |  Related Tickets:  #8740
  rejects valid program              |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * related:   => #8740


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8128#comment:8>
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