texi2dvi / egrep issue shows (a.o.) up in R-alpha

L.S.

I noticed weird tools::texi2dvi behaviour on R-alpha
when specifying an absolute path to the .tex
file.

The same phenomenon also appears to occur on
R-2.12.2, so maybe the issue is independent
of R.

I hope I did not overlook any important information.

Best,
Tobias

 > require(tools)
Loading required package: tools
 > getwd()
[1] "/home/tobias"
 > texi2dvi("test.tex") # works OK
 > texi2dvi("/home/tobias/test.tex")
Error in texi2dvi("/home/tobias/test.tex") :
   Running 'texi2dvi' on '/home/tobias/test.tex' failed.
Messages:
egrep: Invalid range end
/usr/bin/texi2dvi: cannot read .//home/tobias/test.tex, skipping.
 > sessionInfo()
R version 2.13.0 alpha (2011-03-19 r54880)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C
  [3] LC_TIME=en_US.utf8        LC_COLLATE=en_US.utf8
  [5] LC_MONETARY=C             LC_MESSAGES=en_US.utf8
  [7] LC_PAPER=en_US.utf8       LC_NAME=C
  [9] LC_ADDRESS=C              LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C

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

This is Ubuntu 10.10 with GNU grep 2.6.3 and
texi2dvi (GNU Texinfo 4.13) 1.135.

The test file is most simple:

\documentclass{article}
\begin{document}
Test document.
\end{document}