[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 Phyx-):

 Well, my TeamCity runs patch the testrunner to run in parallel.

 The weird thing is, it doesn't happen on my old msys installes, with
 python 3.4.3, I don't know if this started because of a change in python
 or the msys runtime.

 Another odd thing is that I would expect the tests that trigger this to be
 pretty random. But according to my teamcity data of the past ~1 month, the
 tests that fail are pretty stable. +- 3-4 tests each run, but all in the
 same category. Mostly the TH tests.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12554#comment:6>
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