Missing node ancestors

[epenet]

Hi 👋

I've bumped into an issue in a pylint plugin at Home Assistant, where requesting ancestors from a node fails to retrieve the full list of ancestors.

I have a class defined as

class DevoloScannerEntity(
    CoordinatorEntity[DevoloDataUpdateCoordinator[list[ConnectedStationInfo]]],
    ScannerEntity,
):

I am analysing the node ancestors using ancestors = list(node.ancestors()) and some are missing!
I would expect all ancestors to be: ['CoordinatorEntity', 'BaseCoordinatorEntity', 'Entity', 'object', 'ScannerEntity', 'BaseTrackerEntity']
But the display shows: ['CoordinatorEntity', 'BaseCoordinatorEntity', 'Entity', 'object']
It is missing ScannerEntity and BaseTrackerEntity

See sample run on https://github.com/home-assistant/core/actions/runs/11589842191/job/32266212034?pr=129483

I am unsure if it is linked to pylint-dev/pylint#9138 or not.
I may be linked to the version of Python (I am unable to reproduce locally with python 3.12.3 - the CI is running python 3.12.7)
There are three instances of ValueError: generator already executing

Python 3.12.7
Exception ignored in: <generator object raise_if_nothing_inferred.<locals>.inner at 0x7f2f6ba5ae40>
Traceback (most recent call last):
  File "/home/runner/work/core/core/venv/lib/python3.12/site-packages/astroid/decorators.py", line 99, in inner
    yield from generator
ValueError: generator already executing
Exception ignored in: <generator object raise_if_nothing_inferred.<locals>.inner at 0x7f2f683ec340>
Traceback (most recent call last):
  File "/home/runner/work/core/core/venv/lib/python3.12/site-packages/astroid/decorators.py", line 99, in inner
    yield from generator
ValueError: generator already executing
Exception ignored in: <generator object raise_if_nothing_inferred.<locals>.inner at 0x7f2f06355840>
Traceback (most recent call last):
  File "/home/runner/work/core/core/venv/lib/python3.12/site-packages/astroid/decorators.py", line 99, in inner
    yield from generator
ValueError: generator already executing
...
All ancestors for homeassistant.components.devolo_home_network.device_tracker.DevoloScannerEntity: ['CoordinatorEntity', 'BaseCoordinatorEntity', 'Entity', 'object']
...
************* Module homeassistant.components.devolo_home_network.device_tracker
Warning: homeassistant/components/devolo_home_network/device_tracker.py:84:0: C7461: Derived CoordinatorEntity is recommended to be placed in the 'entity' module (hass-enforce-class-module)
...
Error: Process completed with exit code 16.

[epenet]

Note: it seems to be at least partly related to parallelism - as running pylint with jobs=1 makes the issue go away.
https://github.com/home-assistant/core/actions/runs/11590052863/job/32266876576
That gets rid of two ValueError: generator already executing, and causes the ancestors to be correctly retrieved

[DanielNoord]

Isn't this a duplicate of pylint-dev/pylint#9138?

[epenet]

Isn't this a duplicate of pylint-dev/pylint#9138?

As I said in the description... I am not sure!
It might be the same root cause but it also kinda feels different.

[DanielNoord]

Oh I'm sorry, completely overlooked that.

But yeah, I think it is very likely the same. Especially since the version and repository match. Closing this as duplicate (for now)