[Rd] crash using fisher.test on Windows; was [R] unexpected crash of R under (PR#644)
ligges@statistik.uni-dortmund.de
ligges@statistik.uni-dortmund.de
Fri, 25 Aug 2000 08:47:00 +0200 (MET DST)
Prof Brian D Ripley wrote:
>
> On Thu, 24 Aug 2000, Emmanuel Paradis wrote:
>
> > Dear All,
> >
> > We encountered an unexpected crash with R under Windows when running
> > fisher.test(). We had this problem only under this OS and only with the
> > following data:
> >
> > > T
> > [,1] [,2]
> > [1,] 2 1
> > [2,] 2 1
> > [3,] 4 0
> > [4,] 8 0
> > [5,] 6 0
> > [6,] 0 0
> > [7,] 1 0
> > [8,] 1 1
> > [9,] 7 1
> > [10,] 8 2
> > [11,] 1 0
> > [12,] 3 1
> > [13,] 1 1
> > [14,] 3 0
> > [15,] 7 2
> > [16,] 4 1
> > [17,] 2 0
> > [18,] 2 0
> > [19,] 2 0
> >
> > The commands:
> >
> > library(ctest)
> > fisher.test(T)
> >
> > result in a crash of R with a system error. (Note that if we change T[19,2]
> > to the value "1", then there is no problem.) The crash occurs with R-1.0.1
> > under Win98, and with R-1.1.1 under WinNT (both with Rgui and with Rterm).
> > However, there is no problem at all under Solaris (tested with R-1.0.1 and
> > R-1.1.0).
>
> Your pinpointing the blame on the Windows port of R is quite unfair. The
> problem is in your usage of the function: the workspace was too small and
> the code was writing outside it. It is pure chance that did not affect any
> the other OSes you tried (or was that just one OS?).
>
> fisher.ctest(T, workspace=1e6) works without crashing on Windows, Solaris
> and Linux here.
I tried with the default of workspace=200000 on WinNT and Solaris. The
crash (Dr. Watson) only happens on WinNT. On Solaris everything works
fine.
Now I tried it using workspace=1000 (too small). On Solaris AND WinNT
the same result:
> fisher.test(T, workspace=1000)
Error in fisher.test(T, workspace = 1000) :
FEXACT error 40.
Out of workspace.
This is the error message, I would expect, but not a crash of R!
CC'ing to R-Bugs with modified subject.
Uwe Ligges
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