R devel - Sep 2006 - segfault in plot(x, y, col = aFactor) (PR#9221)

After the following commands (issued just after starting R)

set.seed(1)
n <- 600
x <- rnorm(n)
y <- rnorm(n)
aFactor <- factor(rep(1:5, length = n))
plot(x, y, col = aFactor)

R prints

 *** caught segfault ***
address 0x10, cause 'memory not mapped'
Segmentation fault

and dies.

(Yes, I know that using a factor as `col' is wrong; I discovered this by a
mistake. :-)

Substituting "aFactor <- factor(rep(1:5, length = n))" with
"aFactor <- rep(1:5, length = n)" (obviously) works as expected.

When n is smaller, for instance 400, no seg.fault seems to happen.

I also tested this on R 2.3.1 (that's actually where I discovered it :-),
and
the same thing happens there.



--please do not edit the information below--

Version:
 platform = x86_64-unknown-linux-gnu
 arch = x86_64
 os = linux-gnu
 system = x86_64, linux-gnu
 status = alpha
 major = 2
 minor = 4.0
 year = 2006
 month = 09
 day = 11
 svn rev = 39258
 language = R
 version.string = R version 2.4.0 alpha (2006-09-11 r39258)

Locale:
LC_CTYPE=no_NO.UTF-8;LC_NUMERIC=C;LC_TIME=no_NO.UTF-8;LC_COLLATE=no_NO.UTF-8;LC_MONETARY=no_NO.UTF-8;LC_MESSAGES=no_NO.UTF-8;LC_PAPER=no_NO.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=no_NO.UTF-8;LC_IDENTIFICATION=C

Search Path:
 .GlobalEnv, package:methods, package:stats, package:graphics,
package:grDevices, package:utils, package:datasets, Autoloads, package:base

-- 
Bj?rn-Helge Mevik

Thank you, Bj?rn-Helge.
A shorter version is
   plot(1:500, col = gl(2,250))

Interestingly, with much shorter vectors of length (n), the correct warning
is produced (n times).
And once that has happened, you can use longer vectors without
any problem.

As you said  ``issued just after starting R''
seems quite relevant.

When run in 'R -d gdb', the backtrace ("bt") seems to indicate
that the problem is happening during the  (C-level) warning() call.

Martin