[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:  patch
        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 simonmar):

 @awson thanks for all the diagnosis, sorry you have to be the one to do
 all this.  I don't think there are any other regular developers building
 and testing on 64-bit Windows.  I hope that when we get nightly builds
 working again things will improve.

 I think your analysis is right, that it is the change to `okToInline` that
 is at fault.  Would you mind doing one more test for me?  I'd like to know
 whether it still works if you don't revert the changes to `isTrivial`,
 which I believe should be fine.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8834#comment:8>
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