My Rcpp code is occasionally failing (SEGFAULT, etc.) for reasons I don't understand. The code creates a large data.frame, and then tries to obtain a subset of this data.frame by calling the R subset function, [.data.frame), from within the same method that is creating the frame. A very simplified version of it is shown below:
// R function to subset data.frame - what will be called to subset
Function subsetinR("[.data.frame");
// Make a dataframe in Rcpp to subset
auto df = List::create( Named("a") = std::vector<double> {1.0, 2.0});
df["b"] = std::vector<double> {3.0, 4.0});
df.attr("class") = "data.frame";
df.attr("row.names") = seq_len(2);
df.attr("file") = "somestuff";
// Now make a vector to subset with
LogicalVector filter = LogicalVector::create(2, TRUE);
// Subset, here is where it fails!
df = subsetinR(wrap(df), filter, R_MissingArg);
However, while this occasionally works, it will other times it fails with one of the following errors: Error: object of type 'symbol' is not subsettable, or libR.dylib was compiled with optimization - stepping may behave oddly; variables may not be available. or occasionally when ruing tests in RStudio instead of at the command line *** caught segfault *** address 0x100000011, cause 'memory not mapped'.
Anyone know what is going wrong?