Index: Lib/test/test_mmap.py
===================================================================
--- Lib/test/test_mmap.py	(revision 70847)
+++ Lib/test/test_mmap.py	(working copy)
@@ -1,6 +1,7 @@
 from test.test_support import TESTFN, run_unittest, import_module
 import unittest
 import os, re
+import itertools as it
 
 mmap = import_module('mmap')
 
@@ -351,11 +352,25 @@
                     self.assertEqual(m[:], expected)
                     m.close()
 
-        # should not crash
-        m = mmap.mmap(-1, 1)
-        self.assertRaises(ValueError, m.move, 1, 1, -1)
+        # segfault test
+        m = mmap.mmap(-1, 100)
+        offsets = [-100, -1, 0, 1, 100]
+        for source, dest, size in it.product(offsets, offsets, offsets):
+            try:
+                m.move(source, dest, size)
+            except ValueError:
+                pass
         m.close()
 
+        # boundry test
+        self.assertRaises(ValueError, m.move, -1, -1, -1)
+        self.assertRaises(ValueError, m.move, -1, -1, 0)
+        self.assertRaises(ValueError, m.move, -1, 0, -1)
+        self.assertRaises(ValueError, m.move, 0, -1, -1)
+        self.assertRaises(ValueError, m.move, -1, 0, 0)
+        self.assertRaises(ValueError, m.move, 0, -1, 0)
+        self.assertRaises(ValueError, m.move, 0, 0, -1)
+
     def test_anonymous(self):
         # anonymous mmap.mmap(-1, PAGE)
         m = mmap.mmap(-1, PAGESIZE)