[GHC] #629: IO library locking doesn't count readers

[GHC]

#629: IO library locking doesn't count readers
-------------------------+--------------------------------------------------
    Reporter:  simonmar  |        Owner:         
        Type:  bug       |       Status:  new    
    Priority:  lowest    |    Milestone:         
   Component:  Compiler  |      Version:  6.4.1  
    Severity:  minor     |   Resolution:         
    Keywords:            |           Os:  Unknown
Architecture:  Unknown   |  
-------------------------+--------------------------------------------------
Changes (by simonmar):

  * summary:  IO library locking bug => IO library locking doesn't count
              readers

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Ticket URL: <http://cvs.haskell.org/trac/ghc/ticket/629>
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