[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:  merge
        Priority:  highest           |        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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Changes (by simonmar):

 * status:  new => merge


Comment:

 I fixed the problem with `-A16k`, which is actually a nasty codegen bug.
 I suspect the problem with `-A4k` is more benign and only occurs with very
 tiny `-A` values, and I think it's been around for a while.

 So merge this patch, then leave the ticket open with a lower prio for the
 -A4k fix.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8817#comment:8>
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