[GHC] #12801: Misleading error message when deriving Functor

[GHC]

#12801: Misleading error message when deriving Functor
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        Reporter:  erikd             |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Poor/confusing    |            Test Case:
  error message                      |  deriving/should_fail/T12801
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * testcase:   => deriving/should_fail/T12801
 * milestone:  8.2.1 => 8.4.1


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12801#comment:4>
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