[GHC] #9407: Program produces different output when compiled with -O

[GHC]

#9407: Program produces different output when compiled with -O
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        Reporter:  arotenberg        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.8.3
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:  x86_64
 Type of failure:  Incorrect result  |  (amd64)
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Thomas Miedema <thomasmiedema@…>):

 In [changeset:"225afc4ace4dff4ae52ac2147942cdeeb76fc723/ghc"
 225afc4a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="225afc4ace4dff4ae52ac2147942cdeeb76fc723"
 Add test T9407 (Windows)

 Add test for #9407. The test is only run on Windows 64bit, as this is
 where the problem occurred.

 Reviewed by: thomie

 Differential Revision: https://phabricator.haskell.org/D1806
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9407#comment:8>
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