Meson build: cached methods are broken if the source is unavailable #39735
Description
Steps To Reproduce
If the source used to build Sage (with meson) is not available at runtime in the same path where it was at build time, (some?) cached methods are completely broken.
- Build sage with meson:
python -m build --wheel --no-isolation - Install the produced wheel
- Delete the sage source code
Expected Behavior
If the source is available:
$ python -c "from sage.all import QQ, PolynomialRing; print(PolynomialRing(QQ, 'x,y').gens_dict())"
{'x': x, 'y': y}
Actual Behavior
If the source is not available:
$ python -c "from sage.all import QQ, PolynomialRing; print(PolynomialRing(QQ, 'x,y').gens_dict())"
Traceback (most recent call last):
File "category_object.pyx", line 857, in sage.structure.category_object.CategoryObject.getattr_from_category
KeyError: '_CategoryObject__gens_dict'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 1, in <module>
from sage.all import QQ, PolynomialRing; PolynomialRing(QQ, 'x,y').gens_dict()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "category_object.pyx", line 293, in sage.structure.category_object.CategoryObject.gens_dict
File "category_object.pyx", line 851, in sage.structure.category_object.CategoryObject.__getattr__
File "category_object.pyx", line 866, in sage.structure.category_object.CategoryObject.getattr_from_category
File "getattr.pyx", line 363, in sage.cpython.getattr.getattr_from_other_class
AttributeError: 'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomialRing_libsingular' object has no attribute '_CategoryObject__gens_dict'
Additional Information
No response
Environment
- OS: Arch Linux, Python 3.13
- Sage Version: 10.6.beta9
Checklist
- I have searched the existing issues for a bug report that matches the one I want to file, without success.
- I have read the documentation and troubleshoot guide