The bug-fix in version 0.9.12 of Rcpp turned out to be incomplete, so a new version 0.9.13 is now on CRAN and will get to Debian shortly.

The Rcpp::Enviroment constructor is now properly fixed (using the global environment as a default value). As well, a new #define was created to detect the clang++ compiler before/after version 3.0.0 as one exceptions header changed location. Unit tests files were also once more updated.

The complete NEWS entry for 0.9.13 is below; more details are in the ChangeLog file in the package and on the Rcpp Changelog page.

0.9.13  2012-06-28

    o   Truly corrected Rcpp::Environment class by having default constructor
        use the global environment, and removing the default argument of
        global environment from the SEXP constructor

    o   Added tests for clang++ version to include bits/exception_defines.h
        for versions 3.0 or higher (similar to g++ 4.6.0 or later), needed to
        include one particular exceptions header

    o   Made more regression tests conditional on the RunAllRcppTests to come
        closer to the CRAN mandate of running tests in sixty seconds

    o   Updated unit test wrapper tests/doRUnit.R as well as unitTests/runTests.R

Thanks to CRANberries, you can also look at a diff to the previous release 0.9.12. As always, even fuller details are on the Rcpp Changelog page and the Rcpp page which also leads to the downloads, the browseable doxygen docs and zip files of doxygen output for the standard formats. A local directory has source and documentation too. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page