[GHC] #13330: forkIO has inconsistent behavior under optimization

[GHC]

#13330: forkIO has inconsistent behavior under optimization
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        Reporter:  dfeuer            |                Owner:  dfeuer
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Core Libraries    |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3189
       Wiki Page:                    |
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Comment (by David Feuer <David.Feuer@…>):

 In [changeset:"701256df88c61a2eee4cf00a59e61ef76a57b4b4/ghc"
 701256df/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="701256df88c61a2eee4cf00a59e61ef76a57b4b4"
 Change catch# demand signature

 * Give `catch#` a lazy demand signature, to make it more honest.

 * Make `catchException` and `catchAny` force their arguments so they
 actually behave as advertised.

 * Use `catch` rather than `catchException` in `forkIO`, `forkOn`, and
 `forkOS` to avoid losing exceptions.

 Fixes #13330

 Reviewers: rwbarton, simonpj, simonmar, bgamari, hvr, austin

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D3244
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13330#comment:11>
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