[GHC] #8834: 64-bit windows cabal.exe segfaults in GC

[GHC]

#8834: 64-bit windows cabal.exe segfaults in GC
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        Reporter:  awson          |            Owner:
            Type:  bug            |           Status:  new
        Priority:  highest        |        Milestone:  7.8.1
       Component:  Compiler       |          Version:  7.8.1-rc2
      Resolution:                 |         Keywords:
Operating System:  Windows        |     Architecture:  x86_64 (amd64)
 Type of failure:  Runtime crash  |       Difficulty:  Unknown
       Test Case:                 |       Blocked By:
        Blocking:                 |  Related Tickets:
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Comment (by thoughtpolice):

 Simon's patch works on x86_64 windows, with or without SPJ's temporary
 workaround committed. Cabal works properly. The testsuite looks quite
 clean modulo some perf numbers. Looks good!

 So I think technically this bug is fixed. But there's still an alleged
 32bit error somewhere that Ganesh had, and Simon also had. I've had
 reports of Windows 7 being problematic in particular, so I'm looking to
 reproduce it right now with my build.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8834#comment:76>
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