[GHC] #8512: Add flag like '-xc' that only reports uncaught exceptions

[GHC]

#8512: Add flag like '-xc' that only reports uncaught exceptions
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        Reporter:  blitzcode         |            Owner:  simonmar
            Type:  feature request   |           Status:  closed
        Priority:  normal            |        Milestone:
       Component:  Runtime System    |          Version:  7.6.3
      Resolution:  wontfix           |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by simonmar):

 * status:  new => closed
 * resolution:   => wontfix


Comment:

 The problem is that there are never any uncaught exceptions.  All
 exceptions are caught at by something, even if it is only the outermost
 default exception handler that we install for all threads.  Typically most
 exceptions will be caught and re-thrown multiple times by things like
 `bracket`.

 I agree it's noisy and undesirable, but I don't think there's anything we
 can do at the RTS level for `-xc`.  However, there is ongoing work on
 stack traces which should eventually provide better facilities here.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8512#comment:1>
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