[GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation

[GHC]

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
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              Reporter:  Doug310     |            Owner:
                  Type:  bug         |           Status:  infoneeded
              Priority:  normal      |        Milestone:  7.8.4
             Component:  GHCi        |          Version:  7.8.1-rc1
            Resolution:              |         Keywords:  exponentiation
      Operating System:  MacOS X     |     Architecture:  x86_64 (amd64)
       Type of failure:  GHCi crash  |       Difficulty:  Unknown
             Test Case:              |       Blocked By:
              Blocking:              |  Related Tickets:
Differential Revisions:              |
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Comment (by rwbarton):

 So GMP 6 has (as I mentioned above) a macro to allocate small blocks with
 `alloca` and large blocks with `malloc`. The current release does not
 correctly use this macro in the code in question, but
 [https://gmplib.org/repo/gmp-6.0/rev/84965a50fd92 this backported patch]
 fixes this. So if we wait for GMP 6.0.1 and then update the in-tree
 tarball, this should get fixed automatically.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:33>
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