mypy RecursionError analyzing pint.facets.plain.quantity.PlainQuantity

Crash Report

mypy crashes with RecursionError while analyzing pint (since pint==0.26.1). Reproduced with compiled and non-compiled mypy.

Traceback

... skipping approx 50000 lines ...
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 560, in visit_instance
    return self.query_types(t.args)
           ~~~~~~~~~~~~~~~~^^^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in query_types
    return any(t.accept(self) for t in types)
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in <genexpr>
    return any(t.accept(self) for t in types)
               ~~~~~~~~^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/types.py", line 1684, in accept
    return visitor.visit_instance(self)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 560, in visit_instance
    return self.query_types(t.args)
           ~~~~~~~~~~~~~~~~^^^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in query_types
    return any(t.accept(self) for t in types)
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in <genexpr>
    return any(t.accept(self) for t in types)
               ~~~~~~~~^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/types.py", line 1684, in accept
    return visitor.visit_instance(self)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 560, in visit_instance
    return self.query_types(t.args)
           ~~~~~~~~~~~~~~~~^^^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in query_types
    return any(t.accept(self) for t in types)
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/type_visitor.py", line 628, in <genexpr>
    return any(t.accept(self) for t in types)
               ~~~~~~~~^^^^^^
  File "/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/mypy/types.py", line 1684, in accept
    return visitor.visit_instance(self)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^
RecursionError: maximum recursion depth exceeded
/home/quentin/dev/QSA/pint_0.x/.venv/lib/python3.13/site-packages/pint/facets/numpy/quantity.py:63: note: use --pdb to drop into pdb
RecursionError: maximum recursion depth exceeded

To Reproduce

I narrowed down the issue to this single import of pint.facets.plain.quantity.PlainQuantity.
Run mypy on a file with this content:

from pint.facets.plain.quantity import PlainQuantity

Your Environment

Issue appears since version 0.26 of pint when they introduced massive type annotations for PlainQuantity. See https://github.com/hgrecco/pint/pull/2302 and https://github.com/hgrecco/pint/pull/2303

• Mypy version used: 2.3.1 and 1.9.1
• Mypy command-line flags: none
• Mypy configuration options from mypy.ini (and other config files): none
• Python version used: 3.13.12
• Operating system and version: Fedora 43 in WSL2

Bắt đầu bằng cách tái hiện lỗi crash với mypy trong một tệp import pint.facets.plain.quantity.PlainQuantity. Theo dõi quá trình đệ quy qua các đường dẫn đã đề cập là type_visitor.py và types.py, sau đó xác minh rằng việc phân tích cùng import đó hoàn tất mà không có RecursionError.