metaclass and new style generics do not work.

Reproduisez le crash avec le modèle Django générique présenté, la métaclasse, la configuration de mypy 2.3 et le traceback. Commencez dans mypy/semanal.py autour de analyze_func_def et defer, puis suivez le chemin du visitor depuis mypy/nodes.py. Le travail est terminé lorsque l’exemple ne lève plus d’erreur interne et que mypy fournit un résultat exploitable pour la classe.

Bug Report
mypy fails with (modern and old) generics and metaclass, the whole application crashes.

To Reproduce
create a class like:

class AbstractModelMeta(ABCMeta, type(models.Model)):
    """
    A Django model and Python abstract class
    https://gist.github.com/gavinwahl/7778717
    """

    pass

class SomeClass[TAttachment: Something](models.Model, metaclass=AbstractModelMeta):
    @abstractmethod
    def send_something(self) -> None:
        """
        Send a notification to the original sender of a classification record that their classification record
        has or has not been processed in AP Automation
        """
        pass

The traceback is:

https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build
Please report a bug at https://github.com/python/mypy/issues
version: 2.3.0
Traceback (most recent call last):
  File "<frozen runpy>", line 203, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "mypy/semanal.py", line 7732, in accept
  File "mypy/nodes.py", line 1165, in accept
  File "mypy/semanal.py", line 991, in visit_func_def
    self.analyze_func_def(defn)
  File "mypy/semanal.py", line 1036, in analyze_func_def
    self.defer(defn)
  File "mypy/semanal.py", line 7333, in defer
    assert not self.final_iteration, "Must not defer during final iteration"
AssertionError: Must not defer during final iteration

src/isp/invoice/classification/models/base/base_classification_record.py:31: note: use --pdb to drop into pdb

Expected Behavior

I expect mypy to correctly understand this. or at least not choke on this.

Actual Behavior

This reports a failure:

error: INTERNAL ERROR -- Please try using mypy master on GitHub:
https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build

Your Environment

• Mypy version used: 2.3
• Mypy command-line flags:
• Mypy configuration options from mypy.ini (and other config files): from toml file:

[tool.mypy]
python_version = "3.12"
plugins = ["mypy_django_plugin.main"]
ignore_missing_imports = true
exclude = ["migrations/", "130192/", "000000/", "130344/"]
mypy_path = "src"

[tool.django-stubs]
django_settings_module = "isp.platform.conf.dev"

• Python version used: 3.14.6

I also tried to tell mypy to ignore this file, but when I add it to the "exclude" everything that refers this breaks. And if I try to ignore it any other way it seems to constantly report this error. Is there a way to tell mypy to ignore a file, and manually say "hey this type should be considered "Any".