[GHC] #8293: user001 spuriously fails if getGroupEntryForID correctly fails

[GHC]

#8293: user001 spuriously fails if getGroupEntryForID correctly fails
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       Reporter:  ezyang  |             Owner:
           Type:  bug     |            Status:  new
       Priority:  lowest  |         Milestone:
      Component:          |           Version:  7.7
  libraries/unix          |  Operating System:  Linux
       Keywords:          |   Type of failure:  Incorrect result at runtime
   Architecture:          |         Test Case:  user001
  Unknown/Multiple        |          Blocking:
     Difficulty:          |
  Unknown                 |
     Blocked By:          |
Related Tickets:          |
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 In some cases, a user's current group ID can be a number for a non-
 existent group.  While this usually indicates the system is misconfigured
 in some way, it can also occur inside chroots or other environments where
 the information in /etc/groups is not to be considered reliable.
 Unfortunately, the user001 has no way of telling that the failure is
 proper, and fails the test anyway. We ought to do something more robust.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8293>
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