diff options
Diffstat (limited to 'Objects/object.c')
| -rw-r--r-- | Objects/object.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Objects/object.c b/Objects/object.c index e2a019f..91531e0 100644 --- a/Objects/object.c +++ b/Objects/object.c @@ -524,7 +524,11 @@ default_3way_compare(PyObject *v, PyObject *w) int c; if (v->ob_type == w->ob_type) { - /* same type: compare pointers */ + /* When comparing these pointers, they must be cast to + * integer types (i.e. Py_uintptr_t, our spelling of C9X's + * uintptr_t). ANSI specifies that pointer compares other + * than == and != to non-related structures are undefined. + */ Py_uintptr_t vv = (Py_uintptr_t)v; Py_uintptr_t ww = (Py_uintptr_t)w; return (vv < ww) ? -1 : (vv > ww) ? 1 : 0; |