[1.2.X] Fixed #14027 -- Ensure that reverse() raises an exception when you try to reverse None. Thanks to Alex for the report and patch.

Backport of r13499 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13500 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/urlresolvers.py

@@ -183,7 +183,8 @@ class RegexURLResolver(object):
             else:
                 bits = normalize(p_pattern)
                 lookups.appendlist(pattern.callback, (bits, p_pattern))
-                lookups.appendlist(pattern.name, (bits, p_pattern))
+                if pattern.name is not None:
+                    lookups.appendlist(pattern.name, (bits, p_pattern))
         self._reverse_dict = lookups
         self._namespace_dict = namespaces
         self._app_dict = apps

tests/regressiontests/urlpatterns_reverse/tests.py

@@ -119,6 +119,10 @@ class URLPatternReverse(TestCase):
             else:
                 self.assertEquals(got, expected)
 
+    def test_reverse_none(self):
+        # Reversing None should raise an error, not return the last un-named view.
+        self.assertRaises(NoReverseMatch, reverse, None)
+
 class ResolverTests(unittest.TestCase):
     def test_non_regex(self):
         """