[GHC] #15255: overflow1 breaks on i386

[GHC]

#15255: overflow1 breaks on i386
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  bgamari
               Type:  bug            |            Status:  new
           Priority:  high           |         Milestone:  8.6.1
          Component:  Continuous     |           Version:  8.4.3
  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 i386 CircleCI target is showing a mysterious failure of the
 `overflow1` test:
 {{{
 =====> overflow1(normal) 4082 of 6414 [0, 3, 0]
 Wrong exit code for overflow1(normal)(expected 251 , actual 0 )
 *** unexpected failure for overflow1(normal)
 }}}

 Need to work out what is going on here.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15255>
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