values/settings is not useful to KernelGroupConfig

tiramisu/setting.py

@@ -214,6 +214,9 @@ class ConfigBag:
     def copy(self):
         kwargs = {}
         for key in self.__slots__:
+            if key in ['properties', 'permissives'] and \
+                    not hasattr(self.context, '_impl_settings'):
+                continue
             kwargs[key] = getattr(self, key)
         return ConfigBag(**kwargs)