[GHC] #2612: deriving Data.Typeable on phantom newtypes does not report that DeriveDataTypeable is needed

[GHC]

#2612: deriving Data.Typeable on phantom newtypes does not report that
DeriveDataTypeable is needed
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    Reporter:  guest     |        Owner:         
        Type:  bug       |       Status:  new    
    Priority:  normal    |    Milestone:         
   Component:  Compiler  |      Version:  6.9    
    Severity:  normal    |   Resolution:         
    Keywords:            |     Testcase:         
Architecture:  x86       |           Os:  MacOS X
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Changes (by guest):

 * cc: tom.davie at gmail.com (added)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2612#comment:1>
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