[GHC] #4028: Derived Data instance requires Data instances for unused type parameters

[GHC]

#4028: Derived Data instance requires Data instances for unused type parameters
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        Reporter:  igloo             |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  Not GHC
       Component:  Compiler (Type    |              Version:  6.12.2
  checker)                           |
      Resolution:  wontfix           |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * keywords:   => deriving


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4028#comment:8>
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