[GHC] #12163: Surprising error message when deriving Functor for a GADT

[GHC]

#12163: Surprising error message when deriving Functor for a GADT
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        Reporter:  benjamin.hodgson  |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:  fixed             |             Keywords:
Operating System:  MacOS X           |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Incorrect         |            Test Case:
  warning at compile-time            |  deriving/should_fail/T12163
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by simonpj):

 * testcase:   => deriving/should_fail/T12163
 * status:  new => closed
 * resolution:   => fixed
 * milestone:   => 8.2.1


Comment:

 Good idea thanks.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12163#comment:6>
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