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

[GHC]

#14346: 8.2.1 regression: heap corruption after safe foreign calls
-------------------------------------+-------------------------------------
        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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Changes (by RyanGlScott):

 * status:  new => infoneeded


Comment:

 For whatever reason, I'm not able to reproduce this on either my Ubuntu
 14.04 or 17.04 machines with GHC 8.2.1. I'm doing this:

 {{{
 $ ghc -fforce-recomp -threaded bug.c Bug.hs
 [1 of 1] Compiling Main             ( Bug.hs, Bug.o )
 Linking Bug ...
 $ ./Bug
 }}}

 It then proceeds to run forever (AFAICT) without hitting any `value
 mistmatch`es or segfaults.

 Some questions:

 1. What operating system are you using?
 2. How can I reproduce this issue //with just GHC//? Please, no
 instructions involving fancy build tools like `stack`, since if this
 really is a GHC bug, one should be able to trigger the issue with just
 GHC.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14346#comment:1>
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