[GHC] #9407: Program produces different output when compiled with -O

[GHC]

#9407: Program produces different output when compiled with -O
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        Reporter:  arotenberg        |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.8.3
      Resolution:  fixed             |             Keywords:
Operating System:  Windows           |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |  numeric/should_run/T9407
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 I wonder if this might have been the same bug as #10521. If so then it
 should be broken in 7.8 and 7.10.1 but not 7.6 or 7.10.2. I have no
 specific theory about why it would be Windows-only though.

 If someone would care to test 7.10.1 and 7.6 on Windows, I would be
 curious to know the results.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9407#comment:10>
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