[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:  snoyberg
            Type:  bug               |               Status:  patch
        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:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D42
       Wiki Page:                    |
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Comment (by nh2):

 Replying to [comment:8 nh2]:
 > On ghc 8.0.2, this crashes with `fdReady: msecs != 0, this shouldn't
 happen`.

 This is fixed for GHC 8.2 per #13525
 (https://phabricator.haskell.org/rGHCe5732d2a28dfb8a754ee73e124e3558222a543bb)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8684#comment:11>
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