[Rd] reproducible segmentation fault caused by textConnection()

[Gregoire Pau]

Dear all,

It seems that textConnection() can trigger a segmentation fault. The
following script (using two large loops) makes this bug reproducible:

for (i in 1:10000) {
   z=textConnection(NULL,open='w')
   for (j in 1:100) {
     write(runif(1)*1e6,file=z)
     write('\n',file=z)
   }
   close(z)
}

The bug could be reproduced on R-2.6.1, R-2.7.0 and on the latest 
R-devel 2008-04-29 r45543.
Here are some sessionInfo() details:
*----*
R version 2.6.1 (2007-11-26)
x86_64-unknown-linux-gnu

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

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base
*----*
R version 2.7.0 (2008-04-22)
x86_64-unknown-linux-gnu

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

attached base packages:
[1] stats     graphics  grDevices datasets  utils     methods   base
*----*
R version 2.8.0 Under development (unstable) (2008-04-29 r45543)
x86_64-unknown-linux-gnu

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

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

Greg
---
Gregoire Pau
EMBL/EBI Cambridge, UK
http://www.ebi.ac.uk/~gpau