[GHC] #8817: segmentation fault in 7.8 RC1

[GHC]

#8817: segmentation fault in 7.8 RC1
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        Reporter:  hamishmack        |            Owner:  simonmar
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:  7.8.1
       Component:  Runtime System    |          Version:  7.8.1-rc1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by luite):

 Hamishmack and me were debugging the random GHCJS segfaults we we've been
 having for a while, trying to reproduce them with a smaller program, and
 then stumbled into this. So I hope the fix for this will also affect non-
 silly scenarios :)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8817#comment:5>
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