[GHC] #7800: Error message when deriving Typeable without PolyKinds

[GHC]

#7800: Error message when deriving Typeable without PolyKinds
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    Reporter:  monoidal          |       Owner:  dreixel                          
        Type:  bug               |      Status:  new                              
    Priority:  normal            |   Milestone:  7.8.1                            
   Component:  Compiler          |     Version:  7.7                              
    Keywords:                    |          Os:  Unknown/Multiple                 
Architecture:  Unknown/Multiple  |     Failure:  Incorrect warning at compile-time
  Difficulty:  Unknown           |    Testcase:                                   
   Blockedby:                    |    Blocking:                                   
     Related:                    |  
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Changes (by igloo):

  * difficulty:  => Unknown
  * milestone:  => 7.8.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7800#comment:2>
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