[GHC] #5902: Cannot tell from an exception handler whether the exception was asynchronous

[GHC]

#5902: Cannot tell from an exception handler whether the exception was
asynchronous
---------------------------------+------------------------------------------
    Reporter:  simonmar          |       Owner:  simonmar        
        Type:  bug               |      Status:  new             
    Priority:  high              |   Milestone:  7.6.1           
   Component:  Compiler          |     Version:  7.4.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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 Following on from #2558 which was closed (by me) as wontfix, we still
 don't have a way to reliably tell whether an exception we caught was
 asynchronous or not.  There are some suggestions in #2558, we just need to
 implement something.  The fix for #3997 was defficient due to this, as
 exposed by the test program in #5866.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5902>
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