[GHC] #12554: Testsuite exhibits large amount of framework failures

[GHC]

#12554: Testsuite exhibits large amount of framework failures
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        Reporter:  Phyx-             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Test Suite        |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 So we're still at it. The current state of things is that,
  * msys `python-3.4.3` works with `msys2-runtime < 2.5.2`
  * msys `python-3.4.3`` does not work with runtime 2.5.1 nor 2.5.2
  * mingw `python-2.7.11` does not work with either runtime
 In all cases the failure mode is error 183 during test directory deletion.

 In light of this it seems likely that there are two bugs:
  * CPython has a Windows compatibility bug (hence none of the mingw builds
 work)
  * `msys2-runtime >= 2.5.2` has a regression

 While the `msys2-runtime` issue is likely easier to track down since its a
 regression over a rather small diff, it's unfortunately not the issue we
 really care about. We'd far prefer to have mingw python working;
 unfortunately this is a much harder issue to debug.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12554#comment:18>
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