[GHC] #13977: ExnStr doesn't propagate "outwards"

[GHC]

#13977: ExnStr doesn't propagate "outwards"
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:  Exceptions
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3756
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * keywords:   => Exceptions


Comment:

 I believe this fix may bear on a number of tickets which have come up in
 the past year or so,

  * #13380: `raiseIO#` result looks wrong
  * #13330: `forkIO` has inconsistent behavior under optimization
  * #11555: `catch` _|_ breaks at `-O1`
  * #11222: Teach strictness analysis about `catch`-like operations
  * #13357: Check demand signatures for `catchRetry#` and `catchSTM#`

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13977#comment:9>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler