[Rd] Error generated by .Internal(nchar) disappears when debugging

[Joris Meys]

Malcolm,

I tested the code on a clean R 3.2.0 session. Not even in RStudio, just to
rule that out.

> sessionInfo()
R version 3.2.0 (2015-04-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8 x64 (build 9200)

locale:
[1] LC_COLLATE=English_United Kingdom.1252
[2] LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] copula_0.999-13

loaded via a namespace (and not attached):
 [1] Matrix_1.2-0     ADGofTest_0.3    tools_3.2.0      pspline_1.0-17
 [5] gsl_1.9-10       mvtnorm_1.0-3    grid_3.2.0       stats4_3.2.0
 [9] lattice_0.20-31  stabledist_0.7-0 fortunes_1.5-2


On Wed, Oct 7, 2015 at 9:52 PM, Cook, Malcolm <MEC at stowers.org> wrote:

> What other packages do you have loaded?  Perhaps a BioConductor one that
> loads S4Vectors that announces upon load:
>
>         Creating a generic function for 'nchar' from package 'base' in
> package 'S4Vectors'
>
> Maybe a red herring...
>
> ~Malcolm
>
>  > -----Original Message-----
>  > From: R-devel [mailto:r-devel-bounces at r-project.org] On Behalf Of
> Duncan
>  > Murdoch
>  > Sent: Monday, October 05, 2015 6:57 PM
>  > To: Matt Dowle <mattjdowle at gmail.com>; r-devel at stat.math.ethz.ch
>  > Subject: Re: [Rd] Error generated by .Internal(nchar) disappears when
>  > debugging
>  >
>  > On 05/10/2015 7:24 PM, Matt Dowle wrote:
>  > > Joris Meys <jorismeys <at> gmail.com> writes:
>  > >
>  > >>
>  > >> Hi all,
>  > >>
>  > >> I have a puzzling problem related to nchar. In R 3.2.1, the internal
>  > > nchar
>  > >> gained an extra argument (see
>  > >> https://stat.ethz.ch/pipermail/r-announce/2015/000586.html)
>  > >>
>  > >> I've been testing code using the package copula, and at home I'm
>  > >> still running R 3.2.0 (I know, I know...). When trying the following
>  > >> code, I
>  > > got
>  > >> an error:
>  > >>
>  > >>> library(copula)
>  > >>> fgmCopula(0.8)
>  > >> Error in substr(sc[i], 2, nchar(sc[i]) - 1) :
>  > >>   4 arguments passed to .Internal(nchar) which requires 3
>  > >>
>  > >> Cheers
>  > >> Joris
>  > >
>  > >
>  > > I'm seeing a similar problem. IIUC, the Windows binary .zip from CRAN
>  > > of any package using base::nchar is affected. Could someone check my
>  > > answer here is correct please :
>  > > http://stackoverflow.com/a/32959306/403310
>  >
>  > Nobody has posted a simple reproducible example here, so it's kind of
> hard to
>  > say.
>  >
>  > I would have guessed that a change to the internal signature of the C
> code
>  > underlying nchar() wouldn't have any effect on a package that called
> the R
>  > nchar() function.
>  >
>  > When I put together my own example (a tiny package containing a function
>  > calling nchar(), built to .zip using R 3.2.2, installed into R 3.2.0),
> it confirmed
>  > my guess.
>  >
>  > On the other hand, if some package is calling the .Internal function
> directly, I'd
>  > expect that to break.  Packages shouldn't do that.
>  >
>  > So I'd say there's been no evidence posted of a problem in R here,
> though
>  > there may be problems in some of the packages involved.  I'd welcome an
>  > example that provided some usable evidence.
>  >
>  > Duncan Murdoch
>  >
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>
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>



-- 
Joris Meys
Statistical consultant

Ghent University
Faculty of Bioscience Engineering
Department of Mathematical Modelling, Statistics and Bio-Informatics

tel :  +32 (0)9 264 61 79
Joris.Meys at Ugent.be
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