[GHC] #15544: Non-deterministic segmentation fault in cryptohash-sha256 testsuite

[GHC]

#15544: Non-deterministic segmentation fault in cryptohash-sha256 testsuite
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5145
       Wiki Page:                    |
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Comment (by osa1):

 The patch (when applied to 8.6 branch with STM fix, after a distclean)
 seems to fix the segfault, but I'm still getting

 {{{
 test-sha256: too many pending signals
 }}}

 I see that this error was not reported before but it's something I was
 getting while trying to reproduce the segfault. Maybe there are multiple
 bugs?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15544#comment:26>
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