[GHC] #10742: GHC cannot deduce (irrelevant) reflexive type equality.

[GHC]

#10742: GHC cannot deduce (irrelevant) reflexive type equality.
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        Reporter:  ntc2              |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.10.2
  checker)                           |                Keywords:  TypeLits
      Resolution:                    |  GADTs
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |               Test Case:
  valid program                      |  polykinds/T10742
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by simonpj):

 * testcase:   => polykinds/T10742


Comment:

 Since it works in HEAD, I'm inclined to close this and move on.  Unless it
 is causing real pain that 7.10.2 doesn't work.

 I've added a regression test though, to make sure it stays working!

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10742#comment:3>
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