[GHC] #15463: "Serious" validation failures on i686

[GHC]

#15463: "Serious" validation failures on i686
-------------------------------------+-------------------------------------
           Reporter:  alpmestan      |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.5
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86            |   Type of failure:  None/Unknown
          Test Case:  T3171,         |        Blocked By:
  heapprof001                        |
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 A very recent run of `./validate` on i686 revealed 6 failures, 4 of which
 I'm hopefully fixing with [https://phabricator.haskell.org/D5031 D5031],
 but the other two look more serious.

 The circle ci build logs are here: https://circleci.com/gh/ghc/ghc/7578

 One of the remaining failures in particular seems somewhat critical:

 {{{
 Wrong exit code for heapprof001(prof_hc_hb)(expected 0 , actual 139 )
 Stdout ( heapprof001 ):
 a <=
 a <=
 a <=
 a <=
 a <=
 a <=
 a <=
 Stderr ( heapprof001 ):
 Segmentation fault
 *** unexpected failure for heapprof001(prof_hc_hb)
 }}}

 While the other one might be a lot simpler:

 {{{
 Actual stdout output differs from expected:
 --- ./ghci/should_run/T3171.run/T3171.stdout.normalised 2018-07-31
 05:27:01.821192706 +0000
 +++ ./ghci/should_run/T3171.run/T3171.run.stdout.normalised     2018-07-31
 05:27:01.821192706 +0000
 @@ -1 +0,0 @@
 -Interrupted.
 *** unexpected failure for T3171(normal)
 }}}

 I have not investigated any of those yet, but the first one does seem like
 a bug.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15463>
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