1 files changed, 18 insertions, 3 deletions
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index e7c3709c4a..8449fc7a24 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -930,12 +930,27 @@ rangeiter_new(PyTypeObject *type, PyObject *args, PyObject *kw)
 {
     long start, stop, step;
 
-    if (!_PyArg_NoKeywords("rangeiter()", kw))
+    if (PyErr_WarnEx(PyExc_DeprecationWarning,
+                     "range_iterator(): creating instances of range_iterator "
+                     "by calling range_iterator type is deprecated",
+                     1)) {
         return NULL;
+    }
+
+    if (!_PyArg_NoKeywords("range_iterator()", kw)) {
+        return NULL;
+    }
 
-    if (!PyArg_ParseTuple(args, "lll;rangeiter() requires 3 int arguments",
-                          &start, &stop, &step))
+    if (!PyArg_ParseTuple(args,
+                          "lll;range_iterator() requires 3 int arguments",
+                          &start, &stop, &step)) {
         return NULL;
+    }
+    if (step == 0) {
+        PyErr_SetString(PyExc_ValueError,
+                        "range_iterator() arg 3 must not be zero");
+        return NULL;
+    }
 
     return fast_range_iter(start, stop, step);
 }