[GHC] #4812: doesDirectoryExist always returns False on Mac OS X

[GHC]

#4812: doesDirectoryExist always returns False on Mac OS X
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    Reporter:  YitzGale             |        Owner:              
        Type:  bug                  |       Status:  new         
    Priority:  normal               |    Milestone:              
   Component:  libraries/directory  |      Version:  6.12.3      
    Keywords:                       |     Testcase:              
   Blockedby:                       |   Difficulty:              
          Os:  MacOS X              |     Blocking:              
Architecture:  Unknown/Multiple     |      Failure:  None/Unknown
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Comment(by YitzGale):

 Darwin has two totally different stat structures, one for 32 bits and one
 for 64 bits. I attached the stat man page with the relevant information.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4812#comment:3>
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