In http://docs.python.org/dev/c-api/memory.html#examples:

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
char *buf1 = PyMem_New(char, BUFSIZ);
char *buf2 = (char *) malloc(BUFSIZ);
char *buf3 = (char *) PyMem_Malloc(BUFSIZ);
...
PyMem_Del(buf3);  /* Wrong -- should be PyMem_Free() */
free(buf2);       /* Right -- allocated via malloc() */
free(buf1);       /* Fatal -- should be PyMem_Del()  */
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Is there a good reason to have the second set of 3 lines in the opposite order as the first three?  At first I missed that they were in a different order and thought there was an error in the example.  If there's no good reason for the order, it would be worth fixing.  If there is a good reason,  a comment in the example would help.  Either way I'd be glad to patch it (will go ahead with fixing the ordering later today if no one does it first).