[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:  8.6.1
       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,
                                     |  Phab:D1396, Phab:D1457, Phab:D1468,
       Wiki Page:                    |  Phab:D1487, Phab:D1504, Phab:D1508,
  DeterministicBuilds                |  Phab:D4388
-------------------------------------+-------------------------------------

Comment (by shlevy):

 D4388 chips away at more of this, by removing non-determinism in cost
 centre symbol names (which caused linking errors when doing distributed
 builds with nix). A unique was replaced with a 0-based index that
 increments in source location order for a given module, cost centre name,
 and cost centre type.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4012#comment:244>
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