[GHC] #12230: Non-deterministic ghc-iserv terminated error

[GHC]

#12230: Non-deterministic ghc-iserv terminated error
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        Reporter:  ezyang            |                Owner:  simonmar
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  GHCi              |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by erikd):

 On x86_64/Linux (Debian testing) with `BuildFlavour` == `perf-llvm` I get
 40+ (of the 42 tests I'm running) failing every single time.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12230#comment:4>
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