[Rcpp-devel] Rcpp::wrap seg fault (when called with a NULL pointer)

On 24 May 2011 at 17:29, Christoph Bergmeir wrote:
| Hi,
|
| of course it's your decision, but I personally think that adding the check to the wrapper is a good idea. For now, I added the check everywhere in my code where I use a const char* with Rcpp::wrap.

Please try SVN revision 3030 which is now resilient to this particular case
of NULL:

edd at max:~$ r -p /tmp/nil.r
Loading required package: inline
Loading required package: methods
NULL
Bye
edd at max:~$ cat /tmp/nil.r
require(inline)

fun<- cxxfunction(signature(),plugin="Rcpp",body='
   const char *ret = NULL;
   return Rcpp::wrap(ret);
');

fun()
cat("Bye\n")
edd at max:~$

As I joked earlier, it won't help the next time NULL comes hiding as the
payload of another pointer, but at least const char* is now covered. I also
added two quick unit tests.

Thanks for alerting us to this. Segfaults are after all almost always bad.

Dirk