[GHC] #4283: Different behaviour with -O in concurrent program

[GHC]

#4283: Different behaviour with -O in concurrent program
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    Reporter:  simonpj           |        Owner:  simonmar    
        Type:  bug               |       Status:  new         
    Priority:  normal            |    Milestone:  6.16.1      
   Component:  Compiler          |      Version:  6.12.3      
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Changes (by mitar):

 * cc: mmitar@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4283#comment:2>
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