Index: Objects/classobject.c
===================================================================
--- Objects/classobject.c	(revision 76869)
+++ Objects/classobject.c	(working copy)
@@ -1173,6 +1173,13 @@
 		func = instance_getattr(inst, getitemstr);
 		if (func == NULL)
 			return NULL;
+
+		/* Solve bug 7532 */
+		if (i < 0)
+			i = 0;
+		if (j < i)
+			j = i;
+
 		arg = Py_BuildValue("(N)", _PySlice_FromIndices(i, j));
 	}
 	else {
@@ -1262,6 +1269,12 @@
 			if (func == NULL)
 				return -1;
 
+			/* Solve bug 7532 */
+			if (i < 0)
+				i = 0;
+			if (j < i)
+				j = i;
+
 			arg = Py_BuildValue("(N)",
 					    _PySlice_FromIndices(i, j));
 		}
Index: Lib/test/test_index.py
===================================================================
--- Lib/test/test_index.py	(revision 76869)
+++ Lib/test/test_index.py	(working copy)
@@ -187,6 +187,19 @@
     def _getitem_helper(self, base):
         class GetItem(base):
             def __len__(self):
+                return maxint  # cannot return long here
+            def __getitem__(self, key):
+                return key
+        x = GetItem()
+        self.assertEqual(x[self.pos], self.pos)
+        self.assertEqual(x[self.neg], self.neg)
+        # Bug #7532 - Classic class behaves like new-style class
+        self.assertEqual(x[self.neg:self.pos].indices(maxsize), (0, maxsize, 1))
+        self.assertEqual(x[self.neg:self.pos:1].indices(maxsize), (0, maxsize, 1))
+
+    def _getslice_helper_deprecated(self, base):
+        class GetItem(base):
+            def __len__(self):
                 return maxint #cannot return long here
             def __getitem__(self, key):
                 return key
@@ -200,10 +213,16 @@
 
     def test_getitem(self):
         self._getitem_helper(object)
+        # Silence Py3k warning
+        with test_support.check_warnings():
+            self._getslice_helper_deprecated(object)
 
     def test_getitem_classic(self):
         class Empty: pass
         self._getitem_helper(Empty)
+        # Silence Py3k warning
+        with test_support.check_warnings():
+            self._getslice_helper_deprecated(Empty)
 
     def test_sequence_repeat(self):
         self.assertRaises(OverflowError, lambda: "a" * self.pos)