Issue #16402: In range slicing, fix shadowing of exceptions from __index__ method.
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index b67b969..cebccff 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -330,11 +330,11 @@
         if (PyIndex_Check(obj)) {
             result = PyNumber_Index(obj);
         }
-    }
-    if (result == NULL) {
-        PyErr_SetString(PyExc_TypeError,
-                        "slice indices must be integers or "
-                        "None or have an __index__ method");
+        else {
+            PyErr_SetString(PyExc_TypeError,
+                            "slice indices must be integers or "
+                            "None or have an __index__ method");
+        }
     }
     return result;
 }