Ticket #4824: defaults.diff

django/conf/urls/defaults.py

@@ -10 +10 @@
 
 def patterns(prefix, *args):
     pattern_list = []
+    name_dict = {}
     for t in args:
         if isinstance(t, (list, tuple)):
             t = url(prefix=prefix, *t)
         elif isinstance(t, RegexURLPattern):
             t.add_prefix(prefix)
+        if hasattr(t, 'name') and t.name:
+                        if t.name in name_dict:
+                                raise ImproperlyConfigured('Duplicate named URL specified ("%s")' % t.name)
+                        else:
+                                name_dict[t.name] = True
         pattern_list.append(t)
     return pattern_list