[GHC] #12087: Inconsistency in GADTs?

[GHC]

#12087: Inconsistency in GADTs?
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        Reporter:  Iceland_jack      |                Owner:  RyanGlScott
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  GADTs
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11540            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I agree this is possible in principle but it is fiddly in practice.  What
 about
 {{{
 MkF :: Ord a => a -> Eq a => F a
 }}}
 which ought to work too.

 > This isn't exactly what the user wrote, but it's equivalent and
 serviceable.

 Yes but we'll soon have people asking that `:t MkF` prints out the type
 they wrote.

 Nothing deep here I think, but I'm not persuaded that it's a high
 priority.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12087#comment:4>
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