fix #45959: AttributeError: 'NoneType' object has no attribute 'frame'

due to handling of __class__ when importing from living object (because
of missing source code or C-compiled object)

--HG--
branch : stable

1 files changed, 2 insertions, 0 deletions

diff --git a/builder.py b/builder.py
index 9acda4ad..f4563ec4 100644
--- a/builder.py
+++ b/builder.py
@@ -190,6 +190,8 @@ class ASTNGBuilder:
                     class_node = object_build_class(node, member, name)
                     # recursion
                     self.object_build(class_node, member)
+                if name == '__class__' and class_node.parent is None:
+                    class_node.parent = self._done[self._module]
             elif ismethoddescriptor(member):
                 assert isinstance(member, object)
                 object_build_methoddescriptor(node, member, name)