Crash Report

mypy crashes with segmentation fault as such:

mypy-segmentation-fault on  main is 📦 v0.1.0 via 🐍 v3.11.6 (mypy-segmentation-fault-py3.11)
❯ mypy --version
mypy 1.7.1 (compiled: yes)

mypy-segmentation-fault on  main is 📦 v0.1.0 via 🐍 v3.11.6 (mypy-segmentation-fault-py3.11)
❯ mypy -p mypy_segmentation_fault
zsh: segmentation fault  mypy -p mypy_segmentation_fault

with mypy_segmentation_fault.py:

from datetime import UTC, datetime
from typing import Protocol, Self

from injector import Binder, Injector, Module


class NowGenerator(Protocol):
    def __call__(self: Self) -> datetime:
        ...


class NowGeneratorImpl:
    def __call__(self: Self) -> datetime:
        return datetime.now(tz=UTC)


class GeneratorsModule(Module):
    def configure(self: Self, binder: Binder) -> None:
        binder.bind(
            NowGenerator,  # type: ignore[type-abstract]
            to=NowGeneratorImpl,
        )


injector = Injector([GeneratorsModule])
print(injector.get(NowGenerator)())  # type: ignore[type-abstract]

My observation is that if I remove Self type annotation, mypy does not crash and I do realise it is not necessary
(though, it was a good way to avoid hitting ruff's missing-type-self rule, which in theory I could disable).
I don't know if I could reproduce the crash without using python-injector.

Traceback

Unfortunately, nothing useful shows up:

mypy --show-traceback -p mypy_segmentation_fault
zsh: segmentation fault  mypy --show-traceback -p mypy_segmentation_fault

To Reproduce

• Minimum reproducable code: https://github.com/ryo-tagami/mypy-segmentation-fault
• Invoking mypy: mypy -p mypy_segmentation_fault

Your Environment

• Mypy version used: 1.7.1
• Mypy command-line flags: -p mypy_segmentation_fault
• Mypy configuration options from mypy.ini (and other config files): None
• Python version used: 3.11.6
• Operating system and version: macOS Sonoma Version 14.1.2 (23B92) on Apple M2 Pro