[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):

 I pushed some patches which I was testing with to Phab:D2598. They cover a
 few things including Python 3 compatibility, working around the `cleanup`
 issue described above, disabling usage of symlinks on Windows (since they
 require administrator privileges)n and marking a few tests as broken.
 Unfortunately the `cleanup` workaround only narrows the Window and does
 not close it entirely.

 Phyx- has isolated the `cleanup` problem as being a regression in the
 `msys2-runtime` package. 2.5.1 apparently works but 2.5.2 seems to fail.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12554#comment:16>
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