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

[GHC]

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
-------------------------------+----------------------------------
        Reporter:  Doug310     |            Owner:
            Type:  bug         |           Status:  new
        Priority:  normal      |        Milestone:  7.8.1
       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:
-------------------------------+----------------------------------

Comment (by carter):

 my ghc build is a bindist here
 https://github.com/cartazio/ghc/releases/tag/carters-build-7.8-preRC1 from
 commit 12853f4dd3950b7bf9241f7394cc2f40d0b90c9a

 it may be related to that.
 heres my settings file

 {{{
 carter ~ » ghc --info
  [("Project name","The Glorious Glasgow Haskell Compilation System")
  ,("GCC extra via C opts"," -fwrapv")
  ,("C compiler command","gcc-4.8")
  ,("C compiler flags"," -m64 -fno-stack-protector")
  ,("C compiler link flags"," -m64")
  ,("ld command","/usr/bin/ld")
  ,("ld flags"," -arch x86_64")
  ,("ld supports compact unwind","YES")
  ,("ld supports build-id","NO")
  ,("ld supports filelist","YES")
  ,("ld is GNU ld","NO")
  ,("ar command","/usr/bin/ar")
  ,("ar flags","clqs")
  ,("ar supports at file","NO")
  ,("touch command","touch")
  ,("dllwrap command","/bin/false")
  ,("windres command","/bin/false")
  ,("libtool command","libtool")
  ,("perl command","/usr/bin/perl")
  ,("target os","OSDarwin")
  ,("target arch","ArchX86_64")
  ,("target word size","8")
  ,("target has GNU nonexec stack","False")
  ,("target has .ident directive","True")
  ,("target has subsections via symbols","True")
  ,("Unregisterised","NO")
  ,("LLVM llc command","/usr/local/bin/llc-3.4")
  ,("LLVM opt command","/usr/local/bin/opt-3.4")
  ,("Project version","7.8.20140130")
  ,("Booter version","7.6.3")
  ,("Stage","2")
  ,("Build platform","x86_64-apple-darwin")
  ,("Host platform","x86_64-apple-darwin")
  ,("Target platform","x86_64-apple-darwin")
  ,("Have interpreter","YES")
  ,("Object splitting supported","YES")
  ,("Have native code generator","YES")
  ,("Support SMP","YES")
  ,("Tables next to code","YES")
  ,("RTS ways","l debug thr thr_debug thr_l  dyn debug_dyn thr_dyn
 thr_debug_dyn l_dyn thr_l_dyn")
  ,("Support dynamic-too","YES")
  ,("Support parallel --make","YES")
  ,("Dynamic by default","NO")
  ,("GHC Dynamic","YES")
  ,("Leading underscore","YES")
  ,("Debug on","False")
  ,("LibDir","/usr/local/lib/ghc-7.8.20140130")
  ,("Global Package DB","/usr/local/lib/ghc-7.8.20140130/package.conf.d")
  ]

 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:15>
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