bpo-40792: Make the result of PyNumber_Index() always having exact type int. (GH-20443)

Previously, the result could have been an instance of a subclass of int.

Also revert bpo-26202 and make attributes start, stop and step of the range
object having exact type int.

Add private function _PyNumber_Index() which preserves the old behavior
of PyNumber_Index() for performance to use it in the conversion functions
like PyLong_AsLong().

1 files changed, 3 insertions, 3 deletions

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 47ae7a8..7471844 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -531,7 +531,7 @@ _Py_Uid_Converter(PyObject *obj, void *p)
     long result;
     unsigned long uresult;
 
-    index = PyNumber_Index(obj);
+    index = _PyNumber_Index(obj);
     if (index == NULL) {
         PyErr_Format(PyExc_TypeError,
                      "uid should be integer, not %.200s",
@@ -637,7 +637,7 @@ _Py_Gid_Converter(PyObject *obj, void *p)
     long result;
     unsigned long uresult;
 
-    index = PyNumber_Index(obj);
+    index = _PyNumber_Index(obj);
     if (index == NULL) {
         PyErr_Format(PyExc_TypeError,
                      "gid should be integer, not %.200s",
@@ -771,7 +771,7 @@ _fd_converter(PyObject *o, int *p)
     int overflow;
     long long_value;
 
-    PyObject *index = PyNumber_Index(o);
+    PyObject *index = _PyNumber_Index(o);
     if (index == NULL) {
         return 0;
     }