[GHC] #14346: 8.2.1 regression: heap corruption after safe foreign calls

[GHC]

#14346: 8.2.1 regression: heap corruption after safe foreign calls
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        Reporter:  andrewchen        |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  highest           |            Milestone:
       Component:  Runtime System    |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 > I imagine the simplifier has proven that action never returns and then
 dropped the case with the continuation containing the `touch#`. That seems
 like a reasonable thing to do.

 Correct. I believe it is `Simplify.rebuildCall` that is responsible for
 this.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14346#comment:21>
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