(PR#1604) Re: Platform-specific: simple assignments in Rprofile
cause core dump (PR#1604)
Prof Brian D Ripley
ripley@stats.ox.ac.uk
Tue, 28 May 2002 08:33:24 +0100 (BST)
On Tue, 28 May 2002 NEFTH@pacbell.net wrote:
> This only happens on platforms with a faulty implementation
> of realloc(). Some C libraries do not allow realloc() to be
> called with a NULL pointer to resize.
What other platforms give the problem?
The behaviour R assumes is required by the ISO C89 standard (at least
according to Lewine's book). Would it not be better to fix realloc rather
than R: there are many alternative implementations of malloc out there (and
R uses one for Windows).
One issue is that realloc is used in several R packages on CRAN, and
quite possibly in others. These are likely to assume standard-conformant
behaviour. (It is used in other places within the R sources too, but I
assume you checked all of those.)
> The assignment
>
> ISOLatin1 <- 0:255
>
> in Rprofile then causes a core dump. The attached set
> of 4 patches should be very safe to use and fix the problem.
>
> --please do not edit the information below--
>
> Version:
> platform = i386-pc-sco3.2v4.2
> arch = i386
> os = sco3.2v4.2
> system = i386, sco3.2v4.2
> status =
> major = 1
> minor = 4.1
> year = 2002
> month = 01
> day = 30
> language = R
That is not current.
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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