[GHC] #4012: Compilation results are not deterministic

[GHC]

#4012: Compilation results are not deterministic
-------------------------------------+-------------------------------------
        Reporter:  kili              |                Owner:  niteria
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  6.12.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:  11362             |             Blocking:  12262
 Related Tickets:  #10424            |  Differential Rev(s):  Phab:D910,
                                     |  Phab:D1073, Phab:D1133, Phab:D1192,
                                     |  Phab:D1268, Phab:D1360, Phab:D1373,
       Wiki Page:                    |  Phab:D1396, Phab:D1457, Phab:D1468,
  DeterministicBuilds                |  Phab:D1487, Phab:D1504, Phab:D1508
-------------------------------------+-------------------------------------

Comment (by Bartosz Nitka <niteria@…>):

 In [changeset:"e10497b9a3622265b88caa60590ed620ff3d33e2/ghc" e10497b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="e10497b9a3622265b88caa60590ed620ff3d33e2"
 Kill some varEnvElts

 I was able to hide the nondeterminism in some specialized
 function, which I believe will be useful in other places.

 GHC Trac: #4012
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4012#comment:221>
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