[GHC] #8741: `System.Directory.getPermissions` fails on read-only filesystem

[GHC]

#8741: `System.Directory.getPermissions` fails on read-only filesystem
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        Reporter:  hvr               |            Owner:  AlainODea
            Type:  bug               |           Status:  closed
        Priority:  high              |        Milestone:  7.8.1
       Component:  libraries/unix    |          Version:  7.8.1-rc1
      Resolution:  fixed             |         Keywords:
Operating System:  POSIX             |     Architecture:  Unknown/Multiple
 Type of failure:  Incorrect result  |       Difficulty:  Easy (less than 1
  at runtime                         |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by AlainODea):

 Quick curiousity: why is this merged to 7.8 instead of a bugfix on 7.6.3?
 This makes cabal unusable on SmartOS when the packages being installed
 need to do native builds since it crashes on getPermissions to
 /usr/bin/ld.  Haskell Platform 2013.2.0.0 has GHC 7.6.3.  I think this
 means I can't use Haskell Platform on SmartOS without manually patching
 the unix library which seems hackish.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8741#comment:8>
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