bump cysignals to 1.12.6, cypari to 2.2.4

[dimpase]

This provides support for Python 3.14, and drops Python 3.11

📝 Checklist

• The title is concise and informative.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation and checked the documentation preview.

⌛ Dependencies

• Require Python 3.12 or newer; remove outdated workarounds #40936: needed for CI to pass

[cxzhong]

We also need to publish new wheels of cypari2, because the old wheels are not compatible with new cysignals. If someone install the old cypari2 wheels but with new cysignals, it will lead to segfault.

[github-actions]

Documentation preview for this PR (built with commit e2ba58d; changes) is ready! 🎉
This preview will update shortly after each push to this PR.

[cxzhong]

some CI distro runs on Python 3.11. You need to fix it. Just change the compatible python version to 3.12-3.14. I hope in next beta version we can support python 3.14 experimently.

[cysignals-1.12.6]   [spkg-install] meson-python: error: The package requires Python version >=3.12, running on 3.11.2
[cysignals-1.12.6]   [spkg-install] 
[cysignals-1.12.6]   [spkg-install] ERROR Backend subprocess exited when trying to invoke build_wheel
[cysignals-1.12.6]   [spkg-install] ********************************************************************************
[cysignals-1.12.6]   [spkg-install] Error building a wheel for cysignals-1.12.6
[cysignals-1.12.6]   [spkg-install] ********************************************************************************

@dimpase

[tobiasdiez]

some CI distro runs on Python 3.11. You need to fix it. Just change the compatible python version to 3.12-3.14. I hope in next beta version we can support python 3.14 experimently.

see #40936

We also need to publish new wheels of cypari2

see sagemath/cypari2#190

[cxzhong]

some CI distro runs on Python 3.11. You need to fix it. Just change the compatible python version to 3.12-3.14. I hope in next beta version we can support python 3.14 experimently.

see #40936

We also need to publish new wheels of cypari2

see sagemath/cypari2#190

Thank you for your work. I think we can merge this in next beta version.

[dimpase]

testing cypari with python 3.14 now

[enriqueartal]

I built sage with python 3.14 but basically all the tests failed due to segmentation faults. May this PR help to solve the issue?
I did some random tests in the command line and they worked.

[cxzhong]

I built sage with python 3.14 but basically all the tests failed due to segmentation faults. May this PR help to solve the issue?
I did some random tests in the command line and they worked.

because of cysignals and cypari2 are not compatible. You install cysignals 1.12.4 But cypari2 is built with 1.12.6

[cxzhong]

And we require #40936 to let CI pass.

[dimpase]

I added #40936 to dependencies

[enriqueartal]

I managed to build it if Fedora 43 (python 3.14) with this versions, but the tests failed with segmentations faults.

[dimpase]

Are you on cpython 3.14t, or on 3.14?

We aren't ready for 3.14t I suppose.

[enriqueartal]

Python version in Fedora 43 is 3.14.0.

[dimpase]

Can you start sage, or it crashes on startup as well?

[enriqueartal]

It starts and I can make computations. I tried a small file, galois_group_perm.py to run the examples one by one, and it works, with ./sage -t the same file gets only segmentation faults.

[dimpase]

looks like a different version of a package gets loaded in the testing environment.

[cxzhong]

It starts and I can make computations. I tried a small file, galois_group_perm.py to run the examples one by one, and it works, with ./sage -t the same file gets only segmentation faults.

It is because you build version and runtime version is different. First, run ./sage -sh then pip install --upgrade cysignals, next, run pip install --upgrade cypari2. Then run make to rebuild the sagelib. I think it will be better

[dimpase]

How does one get the build into such an inconsistent state? Not rebuilding sagelib after the package upgrades?

[enriqueartal]

I did not rebuild sagelib, but the problem was the same with the previous versions of cysignals and cypari, and also now after rebuilding sagelib. I will try a fresh build

[cxzhong]

I did not rebuild sagelib, but the problem was the same with the previous versions of cysignals and cypari, and also now after rebuilding sagelib. I will try a fresh build

Can you send the doctest log to us?

[enriqueartal]

I send the log of one test.
a.log

[enriqueartal]

And the crash logs ...
crash.log

[dimpase]

what if you run tests single-threaded, i.e.
./sage -tp1 <file> ?

[enriqueartal]

what if you run tests single-threaded, i.e. ./sage -tp1 <file> ?

Same thing. It seems to be a test problem.