[GHC] #4012: Compilation results are not deterministic

[GHC]

#4012: Compilation results are not deterministic
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        Reporter:  kili              |                   Owner:  Fuuzetsu
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  6.12.2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Other             |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by simonpj):

 Thanks for bringing this up Mateusz.

 The ticket description lists four sources of non-deterministic outputs.  I
 think you are saying that 7.10.1 has a fifth (as yet uncharacterised)
 source, which somehow bites more often than the preceding four.  Is that
 right?  Is comment:76 the single exemplar of the difficulty, or are there
 others?

 Mateusz says that we should not release 7.10 until comment:76 is fixed.
 Do others agree?

 Does anyone feel able to characterise what is going on with comment:76?

 Thanks

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4012#comment:79>
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