[GHC] #9999: Typeable deriving behavior different between data families and associated data types

[GHC]

#9999: Typeable deriving behavior different between data families and associated
data types
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        Reporter:  shachaf           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by dreixel):

 With HEAD, the standalone deriving clause works. But `AutoDeriveTypeable`
 is indeed not working as it should here.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9999#comment:2>
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