[GHC] #12096: Attach stacktrace information to SomeException

[GHC]

#12096: Attach stacktrace information to SomeException
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        Reporter:  ndtimofeev        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mnislaih):

 But surely if we had `SomeExceptionWithCallStack` then both 1) and 2) are
 available options, they are not mutually exclusive, right ?

 You could choose to apply 1) to IOError and leave the other exception
 types untouched, applying 2) where viable.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12096#comment:10>
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