[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:  new
        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):
       Wiki Page:                    |
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Comment (by osa1):

 I can't reproduce any failures in this program without using debug runtime
 and
 enabling sanity checks with `-debug -rtsopts -with-rtsopts=-DS` (tried
 with
 `--timeout 1s` too). When I enable sanity checks I get: (this is with GHC
 HEAD)

 {{{
 test-sha256: internal error: ASSERTION FAILED: file rts/sm/Sanity.c, line
 851

     (GHC version 8.7.20180827 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 zsh: abort (core dumped)  cabal new-run --with-ghc=ghc-stage2 --enable-
 test --allow-newer  -- -j 8  999
 }}}

 every once in a few runs.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15544#comment:12>
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