[Rcpp-devel] Possible regression in R-3.2.3 or Rcpp 0.12.3

Dirk Eddelbuettel edd at debian.org
Fri Jan 29 20:29:56 CET 2016

On 29 January 2016 at 11:27, Kevin Ushey wrote:
| When I add some debug printing to the associated subscripting line
| (https://github.com/awalker89/openxlsx/blob/b92bb3acdd6ea759be928c298c6faeef2f26fa3e/src/cppFunctions.cpp#L2608),
| I see:
|    colNumbers.size(): 98,03,150
|    charCols.size(): 95,94,546
| It looks to me like the package is erroneously attempting to subset
| vectors of different sizes, causing out-of-bounds reads.

Nice work.

| Unfortunately, Rcpp is not detecting or warning about this...
| Either way, I believe this is a bug in the openxlsx package, but Rcpp
| should be checking / reporting this.

With (Rcpp)Armadillo you do have an option of turning this on/off. With Rcpp
alone not quite.


http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org

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