[GHC] #14004: G

[GHC]

#14004: G
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        Reporter:  zaoqi             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
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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Comment (by AntC):

 Thanks @zaoqi, you've now provided the full `instance Eq Dyn`. It's
 defining `(==)` in terms of `geq`.

 But you haven't changed the overlap pragmas -- see my comment:4. So you
 get the same compile fail.

 I think your `instance Eq Dyn` is probably not what you want. `geq` looks
 at whether the ''types'' are the same, not the values. So you're going to
 get `Dyn "hello" == Dyn "bye"` coming out `True`.

 You are still not telling us what you think is wrong/what you expect.

 So far as I can tell, GHC is behaving correctly. I would not expect this
 code to compile.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14004#comment:7>
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