[GHC] #10533: Typechecker behaves differently on Phab and on Mac

[GHC]

#10533: Typechecker behaves differently on Phab and on Mac
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        Reporter:  goldfire          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  MacOS X           |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by goldfire):

 Happy to help with further debugging, but it's hard to know where to begin
 without seeing what the correct behavior is, which I can't seem to get on
 my machine. @rwbarton, could you perhaps post your `-ddump-tc-trace` as
 well for comparison? Thanks!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10533#comment:4>
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