[GHC] #14706: T11489 fails if run as root

[GHC]

#14706: T11489 fails if run as root
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  bgamari
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Continuous     |           Version:  8.5
  Integration                        |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 The testcase `T11489` tests for #11489 by creating a `.prof` file,
 removing its write bit, and trying to run a program with profiling
 enabled. Usually the program would fail with an error message as the RTS
 can't open the `.prof` file for writing. However, when run as `root` the
 test succeeds.

 "What madman would compile GHC as `root`?" you ask? Well, CircleCI runs
 builds as `root` by default. It seems like running builds under Docker is
 one way around this, although this seems like a pretty large hammer just
 to eliminate a single test failure.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14706>
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