Ticket #531: debug.patch

core/meta/__init__.py

@@ -229 +229 @@
     def copy(self, **kwargs):
         args = self._orig_init_args.copy()
         args.update(kwargs)
+        nonargs=['is_auto','__builtins__','field','self','f']
+        for nonarg in nonargs:
+            try:
+                args.pop(nonarg)
+            except KeyError:
+                pass
         return self.__class__(**args)
 
     def get_model_module(self):