#include <Python.h>
#include <stdlib.h>
int main()
{
    int i;
    for (i = 0; i < 100; i++) {
        printf("%d\n", i);
        Py_Initialize();
        Py_Finalize();
    }
    return 0;
}

The above code succeeds with Python 3.2, but causes segmentation fault with Python 3.3:

$ ./reinitializations
0
1
2
3
4
5
6
7
8
9
Segmentation fault
$