Hi guys,
I have encountered a reproducible error in using Rcpp, which I have reported below. Basically, while allocation of elements in a vector to a particular value works well for vectors of small sizes, this returns an error when the size of that vector is increased. Either it returns a giblc error or it hangs and never resumes. I have reproduced this error on two different Linux distributions (Ubuntu 10.10 and 10.04 with g++ 4.4.1 and R 2.12.1).
####################################################
library(Rcpp)
library(inline)
src <- '
Rcpp::IntegerMatrix xA(A);
int n=xA.nrow();
NumericVector dist(n);
for(int i=0;i<=n;i++){dist[i]=1.0;}
return dist;'
cxxfun <- cxxfunction(sig=signature(A="matrix"),body=src,plugin="Rcpp",verbose=TRUE)
## Tests.
n <- 20; A <- matrix(0,n,n); dist <- cxxfun(A);
n <- 200; A <- matrix(0,n,n); dist <- cxxfun(A);
n <- 2000; A <- matrix(0,n,n); dist <- cxxfun(A);
*** glibc detected *** /usr/lib/R/bin/exec/R: double free or corruption (!prev): 0x08cfc278 ***
####################################################
Is there something that I doing wrong there?
Thank you very much for your help,
Ced
--
Cedric Ginestet
Centre for Neuroimaging Sciences (L3.04)
NIHR Biomedical Research Centre
Institute of Psychiatry, Box P089
Kings College London
De Crespigny Park
London
SE5 8AF