[GHC] #15834: genSym is not thread safe with respect to setNumCapabilities

[GHC]

#15834: genSym is not thread safe with respect to setNumCapabilities
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        Reporter:  NeilMitchell  |                Owner:  (none)
            Type:  bug           |               Status:  closed
        Priority:  normal        |            Milestone:
       Component:  Compiler      |              Version:  8.6.1
      Resolution:  invalid       |             Keywords:
Operating System:  Linux         |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Changes (by NeilMitchell):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 Looking further, I came up with a minimal test case for generating uniques
 on multiple threads which produced duplicates. I was able to reproduce it
 on our internal build of GHC, but NOT a stock build. I am now fairly
 certain that the build of GHC didn't get THREADED_RTS passed to the
 genSym.c file, explaining the duplicate uniques. Sorry for the noise!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15834#comment:2>
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