[GHC] #8097: internal error: getMBlock: mmap: Operation not permitted

[GHC]

#8097: internal error: getMBlock: mmap: Operation not permitted
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        Reporter:  singpolyma     |            Owner:
            Type:  bug            |           Status:  infoneeded
        Priority:  normal         |        Milestone:
       Component:  Compiler       |          Version:  7.4.2
      Resolution:                 |         Keywords:
Operating System:  Linux          |     Architecture:  x86
 Type of failure:  Runtime crash  |       Difficulty:  Unknown
       Test Case:                 |       Blocked By:
        Blocking:                 |  Related Tickets:
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Comment (by rwbarton):

 Hmm, interesting. I couldn't reproduce with GHC 7.4.2 on Debian Linux
 2.6.32-5-686 (mmap_min_addr = 65536). What kernel version are you running
 (`uname -a`)? And can you run your program under strace:
 {{{
 strace -e trace=mmap2 -o log ./countUniques
 }}}
 and attach the last page or so of `log` to this ticket?

 I'm 95% sure that in HEAD, you will get an out of memory error rather than
 this "Operation not permitted" error, but I'd like to understand what's
 going on here.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8097#comment:4>
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