oldLC object when creating package

Question

I've just noticed whenever I build and reload a package, I have this new object "oldLC." It's never been there before, so why is it appearing now, and how can I make it stop? The only thing I can think of that has changed since the last time I made a package until now is that I installed the newest rstudio.

> load_all()
Loading tmp
> ls()
character(0)

Restarting R session...

> library(tmp)
> ls()
[1] "oldLC"
> oldLC
[1] "en_US.UTF-8"


> sessionInfo()
R version 3.0.2 (2013-09-25)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
[1] tmp_0.1        roxygen2_3.1.0 devtools_1.4.1

loaded via a namespace (and not attached):
 [1] brew_1.0-6      codetools_0.2-8 digest_0.6.4    evaluate_0.5.1 
 [5] httr_0.2        memoise_0.1     parallel_3.0.2  Rcpp_0.11.0    
 [9] RCurl_1.95-4.1  stringr_0.6.2   tools_3.0.2     whisker_0.3-2  

Answer 1

oldLC is a temporary object created by the "SessionBuild.cpp" script.

Here's the relevant snippet from RStudio's GitHub page that explains why it contains locale information:

  // format the command to send to R
  boost::format cmdFmt(
     "suppressPackageStartupMessages("
        "{oldLC <- Sys.getlocale(category = 'LC_COLLATE'); "
        " Sys.setlocale(category = 'LC_COLLATE', locale = 'C'); "
        " on.exit(Sys.setlocale(category = 'LC_COLLATE', locale = oldLC));"
        " %1%; }"
      ")");

I don't know why it's appearing with the most recent update or how to make it stop, but it's something the RStudio folks will want to fix in a future update.