Undefined behaviour in CGAL::internal::vector

main.cpp

// Compile and run as follows:
// $ clang++ main.cpp -I<cgal-and-boost-include-path> -L<cgal-library-path> -lCGAL -fsanitize=undefined
// $ ./a.out
// CGAL/vector.h:75:57: runtime error: reference binding to null pointer of type 'int'
// 
#include <CGAL/vector.h>

int main() {
    CGAL::internal::vector<int> foo;
    std::cout << foo.size() << std::endl;
}