[GHC] #10490: Missing binder type check in coercion equality test?

[GHC]

#10490: Missing binder type check in coercion equality test?
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        Reporter:  ezyang            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.11
  checker)                           |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by goldfire):

 Yes it's a bug. But do what you like here. I think you'll have a very hard
 time tickling this bug, and this code is all going away once kind
 equalities hits (later this summer, really!).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10490#comment:2>
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