[GHC] #15312: getChanContents exception behavior seems a bit odd

[GHC]

#15312: getChanContents exception behavior seems a bit odd
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Core Libraries    |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmar):

 Yeah, this is tricky stuff. We have special handling for async exceptions
 in the IO library, see `Note [async]` in `GHC.IO.Handle.Internals`.

 Note that since you threw `Ex` as an async exception, it should really be
 a child of `AsyncException` in the exception hierarchy, because we use
 that assumption when handling async exceptions differently. (it wouldn't
 have made a difference with your code though).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15312#comment:2>
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