[GHC] #13769: T9405 sporadic failure

[GHC]

#13769: T9405 sporadic failure
-------------------------------------+-------------------------------------
           Reporter:  niteria        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.3
           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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 I just got a failure on travis with T9405 on https://travis-
 ci.org/ghc/ghc/builds/237325270.

 The error:
 {{{
 --- /dev/null   2017-05-29 08:06:46.967079000 +0000
 +++ /tmp/ghctest-eo4toy/test
 spaces/./rts/T9405.run/T9405.run.stderr.normalised       2017-05-29
 23:20:55.665885000 +0000
 @@ -0,0 +1 @@
 +/bin/sh: 4: kill: No such process
 }}}

 What I suspect happens is that under some scheduling and with CPU
 contention, the test instead of timing out just finishes normally.
 Perhaps increasing the sleep time from `2s` should be enough to mitigate.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13769>
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