BTW, replying to an old thread here but I ran into this issue today with
the CvM2SL2Test package. The problem is on line 51 of src/XCvMTest.cc in
that package. If you get a stack trace from that memory not mapped
location in your code you'll see its from std::sort, because line 51 is
violating sort's requirement of "strict weak ordering", because with the
given comparison function comp(x,x) == TRUE. If you change the <= to < on
that line your problem will go away.
I'll send a patch to the maintainer (CCed).
- Murray
(Thanks Karl Millar for helping me debug this this afternoon)
On Wed, Feb 20, 2013 at 5:30 AM, Santiago Guallar <sgual...@yahoo.com>wrote:
> Great Barry!
> Thanks for your time. I will e-mail the package maintainers.
>
> Santi
>
> From: Barry Rowlingson <b.rowling...@lancaster.ac.uk>
> >To: Santiago Guallar <sgual...@yahoo.com>
> >Cc: "r-help@r-project.org" <r-help@r-project.org>
> >Sent: Wednesday, February 20, 2013 1:36 PM
> >Subject: Re: [R] Cramer von Mises test for a discrete distribution
> >
> >On Wed, Feb 20, 2013 at 10:03 AM, Santiago Guallar <sgual...@yahoo.com>
> wrote:
> >> Thanks Barry,
> >>
> >> Following your list order
> >> 1) It pops up a window saying R for windows GUI front-end crashed. Below
> >> three options: look for on-line solutions; shut down the program; debug
> the
> >> program (I'm translating from Spanish)
> >
> >That's good - often people say "crash" when all they have seen is a
> >"stop" from R.
> >
> >> 2) The processor of my laptop is an Intel Core duo 1,60GHz with ram= 4
> GB,
> >> 32 bits. The R version I have installed is 2.15.2 (2012-10-26)
> >
> >Nicely up to date...
> >
> >> 3) I read the posting-guide. Ok, it may be basic statistics. Question
> >> withdrawn
> >
> >Oh don't do that! You're not asking how to do basic statistics, you
> >are trying to do it yourself and getting a crash. Fair question for
> >starters...
> >
> >> I made an additional mistake: I attached the wrong files. Please run the
> >> code with these, and you'll see the problem.
> >
> >Will I, will I, will I....
> >
> >> ct1 = cvmts.test(prm, prpmr) # here R crashes
> >
> >*** caught segfault ***
> >address 0x5620e458, cause 'memory not mapped'
> >
> >Traceback:
> >1: .C("CvMTestStat", as.double(x), as.integer(length(x)),
> >as.double(y), as.integer(length(y)), testscore = double(1))
> >2: cvmts.test(prm, prpmr)
> >
> >Possible actions:
> >1: abort (with core dump, if enabled)
> >2: normal R exit
> >3: exit R without saving workspace
> >4: exit R saving workspace
> >Selection:
> >
> >Yes! This looks like a bug in that package function, a bit of
> >investigation seems to blame it on when you have repeated values in
> >the vectors:
> >
> >> cvmts.test(1:10,1:10)
> >[1] 0.025
> >> cvmts.test(rep(1,10),rep(1,10))
> >[1] 0.955
> >> cvmts.test(rep(1,10),rep(2,10))
> >
> >*** caught segfault ***
> >address 0x514daba8, cause 'memory not mapped'
> >
> >Traceback:
> >1: .C("CvMTestStat", as.double(x), as.integer(length(x)),
> >as.double(y), as.integer(length(y)), testscore = double(1))
> >2: cvmts.test(rep(1, 10), rep(2, 10))
> >
> >Possible actions:
> >1: abort (with core dump, if enabled)
> >2: normal R exit
> >3: exit R without saving workspace
> >4: exit R saving workspace
> >
> >Functions shouldn't crash like this - so time for you to email the
> maintainer:
> >
> >> packageDescription("CvM2SL2Test")$Maintainer
> >[1] "Yuanhui Xiao <yx...@gsu.edu>"
> >
> >The function disappears into C code, but I suspect its dividing by
> >zero somewhere...
> >
> >Barry
> >
> >
> >
> [[alternative HTML version deleted]]
>
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
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