[GHC] #9858: Typeable instances should be kind-aware

[GHC]

#9858: Typeable instances should be kind-aware
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        Reporter:  dreixel           |                   Owner:  dreixel
            Type:  bug               |                  Status:  new
        Priority:  highest           |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.9
      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 ekmett):

 As a data point, disabling Typeable for polykinded code would actually
 break production code for me in a ways I don't see how to fix.

 Code out there just switched from manual deriving of these instances pre
 7.8 for a few particular cases, to the derived ones for 7.8+, but if you
 take away the derived instances and don't let folks write them by hand
 that case falls into a gap, where there is now no way to get even back to
 the 7.6 level of support.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9858#comment:37>
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