AttributeError: 'FuncDef' object has no attribute 'is_trivial_self' #381
Description
Python code:
from typing import Any
from rest_framework.response import Response
from rest_framework.viewsets import ModelViewSet
class UserView(ModelViewSet):
"""Create, List, Update user model. Available for SuperAdmin only."""
def list(
self,
*args: Any,
**kwargs: Any,
) -> Response:
return Response({"a": 1})Returns an error when checking AttributeError: 'FuncDef' object has no attribute 'is_trivial_self'
Diagnostic Data
- Python version
3.12.10
uv pip list
Package Version
----------------------------- -----------------
amqp 5.3.1
argcomplete 3.6.2
asgiref 3.8.1
async-timeout 4.0.3
attrs 25.3.0
autobahn 24.4.2
automat 25.4.16
billiard 4.2.1
celery 5.4.0
certifi 2023.11.17
cffi 1.17.1
channels 4.0.0
channels-redis 4.1.0
charset-normalizer 3.4.2
click 8.1.7
click-didyoumean 0.3.1
click-plugins 1.1.1
click-repl 0.3.0
colorama 0.4.6
commitizen 4.8.2
constantly 23.10.4
coreapi 2.3.3
coreschema 0.0.4
cron-descriptor 1.4.3
croniter 3.0.3
cryptography 45.0.3
daphne 4.0.0
decli 0.6.3
django 4.2.7
django-aesfield 4.0.0
django-celery-beat 2.6.0
django-cors-headers 4.3.1
django-filter 24.3
django-stubs 1.9.0
django-stubs-ext 5.2.0
django-timezone-field 7.1
djangorestframework 3.14.0
djangorestframework-simplejwt 5.3.0
djangorestframework-stubs 1.4.0
drf-extra-fields 3.7.0
drf-yasg 1.21.7
et-xmlfile 2.0.0
filetype 1.2.0
flake8 7.2.0
grpcio 1.59.3
grpcio-tools 1.59.3
gunicorn 21.2.0
hyperlink 21.0.0
idna 3.10
incremental 24.7.2
inflection 0.5.1
iniconfig 2.1.0
itypes 1.2.0
jinja2 3.1.6
kombu 5.5.4
loguru 0.7.2
m2secret-py3 1.3
markupsafe 3.0.2
mccabe 0.7.0
msgpack 1.1.0
mypy 1.16.0
mypy-extensions 1.1.0
numpy 1.26.2
openpyxl 3.1.5
orjson 3.9.14
packaging 25.0
pandas 2.1.3
pandas-stubs 2.3.0.250703
pathspec 0.12.1
pluggy 1.6.0
prompt-toolkit 3.0.51
protobuf 4.25.1
psycopg2-binary 2.9.9
pyasn1 0.6.1
pyasn1-modules 0.4.2
pycodestyle 2.13.0
pycparser 2.22
pyflakes 3.3.2
pygments 2.19.1
pyjwt 2.10.1
pyopenssl 25.1.0
pytest 8.4.0
python-crontab 3.2.0
python-dateutil 2.9.0.post0
python-dotenv 1.0.0
pytz 2025.2
pyyaml 6.0.2
questionary 2.1.0
redis 5.0.1
requests 2.31.0
ruff 0.11.12
service-identity 24.2.0
setuptools 80.9.0
six 1.17.0
sqlparse 0.5.3
termcolor 2.5.0
toml 0.10.2
tomlkit 0.13.3
twisted 24.11.0
txaio 23.1.1
types-grpcio 1.0.0.20250603
types-protobuf 4.25.0.20240417
types-pytz 2025.2.0.20250516
types-pyyaml 6.0.12.20250516
types-requests 2.32.0.20250602
typing-extensions 4.14.0
tzdata 2025.2
uritemplate 4.2.0
urllib3 2.4.0
vine 5.1.0
wcwidth 0.2.13
wemake-python-styleguide 1.1.0
xlsxwriter 3.1.9
zope-interface 7.2Behaviour
Expected Behavior
Actual Behavior
Reproduction Steps:
Logs:
2025-09-03 07:50:36.389 [info] [Trace - 7:50:36 AM] Received notification 'textDocument/publishDiagnostics'.
2025-09-03 07:50:36.924 [info] [Trace - 7:50:36 AM] Sending notification 'textDocument/didChange'.
2025-09-03 07:50:37.063 [info] [Trace - 7:50:37 AM] Sending notification 'textDocument/didChange'.
2025-09-03 07:50:37.213 [info] [Trace - 7:50:37 AM] Sending notification 'textDocument/didChange'.
2025-09-03 07:50:37.560 [info] [Trace - 7:50:37 AM] Sending notification 'textDocument/didSave'.
2025-09-03 07:50:37.564 [info] [Trace - 7:50:37 AM] Received notification 'window/logMessage'.
2025-09-03 07:50:37.565 [info] /home/name/projects/oss-core/osscore/.venv/bin/python3 -m mypy --no-color-output --no-error-summary --show-absolute-path --show-column-numbers --show-error-codes --no-pretty --config-file=./pyproject.toml --show-error-end /home/name/projects/oss-core/osscore/t.py
2025-09-03 07:50:37.565 [info] [Trace - 7:50:37 AM] Received notification 'window/logMessage'.
2025-09-03 07:50:37.566 [info] CWD Server: /home/name/projects/oss-core/osscore
2025-09-03 07:50:39.195 [info] [Trace - 7:50:39 AM] Received notification 'window/logMessage'.
2025-09-03 07:50:39.195 [info] /home/name/projects/oss-core/osscore/.venv/lib/python3.12/site-packages/drf_yasg/__init__.py:2: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
from pkg_resources import DistributionNotFound, get_distribution
Traceback (most recent call last):
File "<frozen runpy>", line 198, in _run_module_as_main
File "<frozen runpy>", line 88, in _run_code
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/__main__.py", line 37, in <module>
console_entry()
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/__main__.py", line 15, in console_entry
main()
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/main.py", line 119, in main
res, messages, blockers = run_build(sources, options, fscache, t0, stdout, stderr)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/main.py", line 203, in run_build
res = build.build(sources, options, None, flush_errors, fscache, stdout, stderr)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 191, in build
result = _build(
^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 267, in _build
graph = dispatch(sources, manager, stdout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 2937, in dispatch
process_graph(graph, manager)
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 3328, in process_graph
process_fresh_modules(graph, prev_scc, manager)
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 3406, in process_fresh_modules
graph[id].load_tree()
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/build.py", line 2096, in load_tree
self.tree = MypyFile.deserialize(data)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 389, in deserialize
tree.names = SymbolTable.deserialize(data["names"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 4039, in deserialize
st[key] = SymbolTableNode.deserialize(value)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 3980, in deserialize
node = SymbolNode.deserialize(data["node"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 250, in deserialize
return method(data)
^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 3401, in deserialize
names = SymbolTable.deserialize(data["names"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 4039, in deserialize
st[key] = SymbolTableNode.deserialize(value)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 3980, in deserialize
node = SymbolNode.deserialize(data["node"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 250, in deserialize
return method(data)
^^^^^^^^^^^^
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 853, in deserialize
set_flags(ret, data["flags"])
File "/home/name/.vscode/extensions/ms-python.mypy-type-checker-2025.2.0/bundled/libs/mypy/nodes.py", line 4099, in set_flags
setattr(node, name, True)
AttributeError: 'FuncDef' object has no attribute 'is_trivial_self'
2025-09-03 07:50:39.195 [info] [Trace - 7:50:39 AM] Received notification 'window/logMessage'.
2025-09-03 07:50:39.195 [info] file:///home/vvoronov/projects/oss-core/osscore/t.py :
2025-09-03 07:50:39.195 [info] [Trace - 7:50:39 AM] Received notification 'textDocument/publishDiagnostics'.