diff --git a/jedi/evaluate_representation.py b/jedi/evaluate_representation.py
index 019e038b..f9bbd2c9 100644
--- a/jedi/evaluate_representation.py
+++ b/jedi/evaluate_representation.py
@@ -769,11 +769,12 @@ class Generator(use_metaclass(cache.CachedMetaClass, pr.Base)):
         debug.warning('Tried to get array access on a generator', self)
         return []
 
-    @property
-    def parent(self):
-        return self.func.parent
-
     def __getattr__(self, name):
+        if name not in ['start_pos', 'end_pos', 'parent', 'get_imports',
+                'asserts', 'doc', 'docstr', 'get_parent_until', 'get_code',
+                'subscopes']:
+            raise AttributeError("Accessing %s of %s is not allowed."
+                                    % (self, name))
         return getattr(self.func, name)
 
     def __repr__(self):