[ESS] commented-out parentheses cause error in C-c C-c

[Stephen Eglen]

Levi Waldron <lwaldron.research at gmail.com> wrote:

> For example the following R code, which contains no errors or unbalanced
> parentheses:
> 
> ## fun <- function(x){
> ##   x^2
> ## }
> 
> print("hello world")
> 
> Using this with an inferior R process, all of the eval commands work except
> for C-c C-c.  If I hold the cursor over the print line (or anywhere) and
> press C-c C-c, I get the following error and it does not evaluate:
> 
> Scan error: "Unbalanced parentheses", 22, 60
> 
> I am using GNU Emacs 21.4.1, ESS version 5.5.  The same problem existed in
> ESS 5.3.8.
Thanks, I can confirm this on Emacs 23.1 (no fix yet though).

Stephen