[GHC] #14998: Sort out the strictness mess for exceptions

[GHC]

#14998: Sort out the strictness mess for exceptions
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.3
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  Exceptions
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 sgraf):

 Also note how the improvements for
 changeset:9915b6564403a6d17651e9969e9ea5d7d7e78e7f (from 2016, from
 #11222) match those of changeset:7c0fff41789669450b02dc1db7f5d7babba5dee6
 (from 2015, subject of item 3).

 Strictness with `catch#` is now a little subtle (if also a lot more
 correct), because callers have to make sure that their action is forced
 before calling it. I wonder if we get more improvements if we make
 `withHandle_'` and friends strict in their `act`ion parameter...

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14998#comment:17>
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