Provide new object for copy routines requiring info. on its destination.

Author: dangreb

pandas/core/generic.py

@@ -6112,7 +6112,10 @@ def __finalize__(self, other, method: str | None = None, **kwargs) -> Self:
                 # impact if attrs are not used; i.e. attrs is an empty dict.
                 # One could make the deepcopy unconditionally, but a deepcopy
                 # of an empty dict is 50x more expensive than the empty check.
-                self.attrs = deepcopy(other.attrs)
+                # We provide the new dataset via the deepcopy memo to properly
+                # supply eventual attribute copy routines requiring information
+                # from its destination
+                self.attrs = deepcopy(other.attrs, memo={object:self})
             self.flags.allows_duplicate_labels = (
                 self.flags.allows_duplicate_labels
                 and other.flags.allows_duplicate_labels