[GHC] #5859: unsafeInterleaveIO duplicates computation when evaluated by multiple threads

[GHC]

#5859: unsafeInterleaveIO duplicates computation when evaluated by multiple
threads
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 Reporter:  joeyadams                    |          Owner:                  
     Type:  bug                          |         Status:  new             
 Priority:  normal                       |      Component:  libraries/base  
  Version:  7.2.2                        |       Keywords:                  
       Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple
  Failure:  Incorrect result at runtime  |       Testcase:                  
Blockedby:                               |       Blocking:                  
  Related:                               |  
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Changes (by PHO):

 * cc: pho@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5859#comment:1>
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