On Fri, 2 Jun 2000, Albrecht Gebhardt wrote:
>
> During testing with R-devel on the alpha I just noticed (after misspelling
> "bin/R" as "bin/R.bin") that R.bin segfaults. It
accesses the empty R_HOME
> variable and should better give an error instead of a crash:
>
> a gdb output snippet:
> ...
> Program received signal SIGSEGV, Segmentation fault.
> 0x3ff800d6a10 in strcpy ()
> (gdb) backtrace
> #0 0x3ff800d6a10 in strcpy ()
> #1 0x1200efda0 in R_load_X11_shlib () at dynload.c:454
> #2 0x1200ecc88 in main (ac=1, av=0x11fffef28) at system.c:160
> (gdb) up
> #1 0x1200efda0 in R_load_X11_shlib () at dynload.c:454
> 454 strcpy(X11_DLL, getenv("R_HOME"));
>
> some test for getenv returning NULL followed by exit(1) would be
> better.
Yes, will do. That's hardly a misspelling, though, and it is hard to know
how far to go to protect users from negligence. I did actually think about
that, and think `it can't happen: R_HOME is always set in R.sh'.
We've been here before: that construction crashes on some systems and not
on others.
--
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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