[GHC] #3875: DPH QuickHull example crashes on SPARC with -N > 1

[GHC]

#3875: DPH QuickHull example crashes on SPARC with -N > 1
------------------------+---------------------------------------------------
    Reporter:  benl     |       Owner:               
        Type:  bug      |      Status:  new          
    Priority:  normal   |   Component:  Compiler     
     Version:  6.13     |    Keywords:               
          Os:  Solaris  |    Testcase:               
Architecture:  sparc    |     Failure:  Runtime crash
------------------------+---------------------------------------------------
 {{{
 ... ghc-head-build/libraries/dph/examples/quickhull$ par/quickhull 10000
 +RTS -N1
 N = 10000: 503/520 503/520 503/520

 ... ghc-head-build/libraries/dph/examples/quickhull$ par/quickhull 10000
 +RTS -N2
 Bus Error (core dumped)
 }}}

 GDB says:

 {{{
 (gdb) bt
 #0  0x0197f5ec in eval_thunk_selector ()
 #1  0x019806e0 in scavenge_block ()
 #2  0x01981b48 in scavenge_loop ()
 #3  0x01974934 in scavenge_until_all_done ()
 #4  0x01975828 in GarbageCollect ()
 #5  0x0196cd3c in scheduleDoGC ()
 #6  0x0196e708 in schedule ()
 #7  0x0196ba54 in real_main ()
 #8  0x0196bbfc in hs_main ()
 #9  0x000121bc in _start ()
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3875>
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