Random timeouts in rings/polynomial/polynomial_element.pyx

[tobiasdiez]

Steps To Reproduce

https://github.com/sagemath/sage/actions/runs/12393386111/job/34595070714#step:11:2301

Expected Behavior

Tests pass

Actual Behavior

sage -t --long --warn-long 30.0 --random-seed=286735480429121101562228604801325644303 src/sage/rings/polynomial/polynomial_element.pyx
Error: /sage/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/cysignals/signals.cpython-310-x86_64-linux-gnu.so(+0x93d4)[0x7f32ad4693d4]
/sage/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/cysignals/signals.cpython-310-x86_64-linux-gnu.so(+0x9496)[0x7f32ad469496]
/sage/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/cysignals/signals.cpython-310-x86_64-linux-gnu.so(+0xc881)[0x7f32ad46c881]
/lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7f32ae9e8520]
/lib/x86_64-linux-gnu/libc.so.6(+0x91117)[0x7f32aea37117]
/lib/x86_64-linux-gnu/libc.so.6(+0x9cc78)[0x7f32aea42c78]
python3(PyThread_acquire_lock_timed+0xa0)[0x556acc422f00]
python3(+0x1a1151)[0x556acc477151]
python3(+0x18c549)[0x556acc462549]
python3(_PyEval_EvalFrameDefault+0x818)[0x556acc44bae8]
python3(+0x198e41)[0x556acc46ee41]
python3(+0x18af94)[0x556acc460f94]
python3(PyObject_CallFunctionObjArgs+0xa3)[0x556acc460e13]
/sage/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/coverage/tracer.cpython-310-x86_64-linux-gnu.so(+0x332e)[0x7f32ae6d132e]
python3(+0x233467)[0x556acc509467]
python3(_PyEval_EvalFrameDefault+0x67b1)[0x556acc451a81]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(_PyObject_FastCallDictTstate+0x16d)[0x556acc456dbd]
python3(_PyObject_Call_Prepend+0x5c)[0x556acc46bd4c]
python3(+0x29e054)[0x556acc574054]
python3(_PyObject_MakeTpCall+0x25b)[0x556acc457b4b]
python3(_PyEval_EvalFrameDefault+0x6f05)[0x556acc4521d5]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(PyObject_Call+0x122)[0x556acc46f882]
python3(_PyEval_EvalFrameDefault+0x2c89)[0x556acc44df59]
python3(+0x198be1)[0x556acc46ebe1]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6f05)[0x556acc4521d5]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyObject_FastCallDictTstate+0xc4)[0x556acc456d14]
python3(+0x194f64)[0x556acc46af64]
python3(_PyObject_MakeTpCall+0x1fc)[0x556acc457aec]
python3(_PyEval_EvalFrameDefault+0x663f)[0x556acc45190f]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6fdc)[0x556acc4522ac]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6fdc)[0x556acc4522ac]
python3(+0x198be1)[0x556acc46ebe1]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6fdc)[0x556acc4522ac]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x556acc451e3c]
python3(_PyFunction_Vectorcall+0x7c)[0x556acc461aec]
python3(+0x22cf02)[0x556acc502f02]
python3(_PyEval_EvalFrameDefault+0x6b6c)[0x5
----------------------------------------------------------------------
sage -t --long --warn-long 30.0 --random-seed=286735480429121101562228604801325644303 src/sage/rings/polynomial/polynomial_element.pyx  # Timed out

Additional Information

Perhaps related to sagemath/cysignals#194

Environment

Latest

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

[user202729]

Honestly I think it's like "unless the library is guaranteed to be reentrant/jump-safe, sigjmp/longjmp is inherently incorrect and the risk of occasional segfault is worth the ability for the user to be able to interrupt computations".

On the other hand timeout is more inexplicable. Surely sigalrm will eventually be processed? (I can't reproduce the test locally either.)