[GHC] #15292: ghc_ticker loops if permission denied on timerfd

[GHC]

#15292: ghc_ticker loops if permission denied on timerfd
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           Reporter:  jon.fairbairn@…  |             Owner:  (none)
               Type:  bug              |            Status:  new
           Priority:  normal           |         Milestone:  8.6.1
          Component:  Compiler         |           Version:  8.2.2
           Keywords:                   |  Operating System:  Linux
       Architecture:  x86_64 (amd64)   |   Type of failure:  Runtime crash
          Test Case:                   |        Blocked By:
           Blocking:                   |   Related Tickets:
Differential Rev(s):                   |         Wiki Page:
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 Using stack with lts-11.6 to compile a cgi programme, I got something that
 runs OK from the command line, but which goes into a busy loop when run
 from httpd.
 This is caused by selinux preventing read on the timer. Changing the
 selunix permissions solves the problems, but ghc-ticker ought to check
 whether the read succeeded and not try again if it fails.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15292>
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