Index: Lib/test/test_range.py
===================================================================
--- Lib/test/test_range.py	(revision 67538)
+++ Lib/test/test_range.py	(working copy)
@@ -45,6 +45,7 @@
         self.assertRaises(ValueError, range, 1, 2, 0)
 
         self.assertRaises(TypeError, range, 0.0, 2, 1)
+        self.assertRaises(TypeError, range, 0.0, 2, -1)
         self.assertRaises(TypeError, range, 1, 2.0, 1)
         self.assertRaises(TypeError, range, 1, 2, 1.0)
         self.assertRaises(TypeError, range, 1e100, 1e101, 1e101)
@@ -57,6 +58,14 @@
         r = range(-sys.maxsize, sys.maxsize, 2)
         self.assertEqual(len(r), sys.maxsize)
 
+        class Index:
+            def __init__(self, x):
+                self.x = x
+            def __index__(self):
+                return self.x
+        self.assertEqual(list(range(Index(0), Index(100), Index(42))),
+                         [0, 42, 84])
+
     def test_repr(self):
         self.assertEqual(repr(range(1)), 'range(0, 1)')
         self.assertEqual(repr(range(1, 2)), 'range(1, 2)')