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

[GHC]

#15544: Non-deterministic segmentation fault in cryptohash-sha256 testsuite
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        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):

 Dumb question: can we not remove unparked TSOs from the wait list in
 unpark_waiters_on()?

 > Would you like to make a patch?

 What do you want the patch to do? Do you want to unconditionally try to
 wake up a thread? (by sending multiple wakup messages sometimes)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15544#comment:19>
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