[GHC] #12438: DeriveDataTypeable - deriving instance Data (Mu (Const ()))

[GHC]

#12438: DeriveDataTypeable - deriving instance Data (Mu (Const ()))
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        Reporter:  lspitzner         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2726
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * differential:   => Phab:D2726
 * milestone:   => 8.2.1


Comment:

 I've submitted a patch for this, as discussed at
 https://mail.haskell.org/pipermail/libraries/2016-November/027396.html.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12438#comment:4>
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