[GHC] #1874: getDirectoryContents yields "invalid argument" instead of "permission error"

[GHC]

#1874: getDirectoryContents yields "invalid argument" instead of "permission
error"
------------------------------------------------------------------+---------
 Reporter:  Orphi                                                 |          Owner:                  
     Type:  bug                                                   |         Status:  new             
 Priority:  low                                                   |      Milestone:  6.10 branch     
Component:  libraries/directory                                   |        Version:  6.8.1           
 Severity:  normal                                                |     Resolution:                  
 Keywords:                                                        |     Difficulty:  Moderate (1 day)
 Testcase:  getDirectoryContents "C:\\System Volume Information"  |   Architecture:  x86             
       Os:  Windows                                               |  
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Changes (by simonmar):

  * difficulty:  Easy (1 hr) => Moderate (1 day)

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1874#comment:9>
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