[GHC] #8684: hWaitForInput cannot be interrupted by async exceptions on unix

[GHC]

#8684: hWaitForInput cannot be interrupted by async exceptions on unix
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        Reporter:  nh2               |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  7.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:  13497, 13525      |             Blocking:
 Related Tickets:  #12912, #13525    |  Differential Rev(s):  Phab:D42
       Wiki Page:                    |
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Comment (by nh2):

 I've implemented a work-in-progress fix for GHC 8.2
 [https://github.com/nh2/ghc/commit/d75bb46b6a16b4976a239442d90e5592ec439495
 in this commit]. It's partly based on my older commit
 [https://github.com/nh2/ghc/commit/b23420378f68af9bddcced1cee08968779c505d0
 b23420378f6].

 It makes my example from the issue description work on the `-threaded`
 runtime on Linux (other platforms yet to be tested), but for unknown
 reason it doesn't fix it for the nonthreaded runtime.

 Maybe somehow in the nonthreaded runtime `timeout` doesn't actually throw
 the other thread the kill?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8684#comment:15>
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