[GHC] #926: infinite loop in ShutdownIOManager()

[GHC]

#926: infinite loop in ShutdownIOManager()
----------------------------+-----------------------------------------------
 Reporter:  guest           |          Owner:         
     Type:  bug             |         Status:  new    
 Priority:  normal          |      Milestone:  6.6.1  
Component:  Runtime System  |        Version:  6.5    
 Severity:  normal          |     Resolution:         
 Keywords:                  |     Difficulty:  Unknown
 Testcase:                  |   Architecture:  x86    
       Os:  Windows         |  
----------------------------+-----------------------------------------------
Changes (by igloo):

  * milestone:  => 6.6.1
  * testcase:  =>

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/926>
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