mypy RecursionError analyzing pint.facets.plain.quantity.PlainQuantity
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還沒有人認領這個 Issue。
評估
研究方向
首先，在匯入 pint.facets.plain.quantity.PlainQuantity 的檔案中使用 mypy 重現當機。追蹤經過所提及路徑 type_visitor.py 和 types.py 的遞迴，然後驗證對相同匯入的分析能夠在沒有 RecursionError 的情況下完成。
由索引模型根據 Issue 內容生成。
描述
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:
2.3.1and1.9.1 - 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
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