Random failure in number_field_element.pyx

[vbraun]

Fails with this particular random seed

sage -t --long --warn-long 47.7 --random-seed=192217669321149031373225857314451720597 src/sage/rings/number_field/number_field_element.pyx
**********************************************************************
File "src/sage/rings/number_field/number_field_element.pyx", line 4419, in sage.rings.number_field.number_field_element.NumberFieldElement.descend_mod_power
Failed example:
    a.descend_mod_power(QQ,2)
Exception raised:
    Traceback (most recent call last):
      File "/home/release/Sage/local/var/lib/sage/venv-python3.9/lib64/python3.9/site-packages/sage/doctest/forker.py", line 694, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/home/release/Sage/local/var/lib/sage/venv-python3.9/lib64/python3.9/site-packages/sage/doctest/forker.py", line 1088, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.rings.number_field.number_field_element.NumberFieldElement.descend_mod_power[8]>", line 1, in <module>
        a.descend_mod_power(QQ,Integer(2))
      File "sage/rings/number_field/number_field_element.pyx", line 4423, in sage.rings.number_field.number_field_element.NumberFieldElement.descend_mod_power (build/cythonized/sage/rings/number_field/number_field_element.cpp:36236)
        raise ValueError("element must be nonzero")
    ValueError: element must be nonzero
**********************************************************************
1 item had failures:
   1 of  10 in sage.rings.number_field.number_field_element.NumberFieldElement.descend_mod_power
    [1157 tests, 1 failure, 10.07 s]
----------------------------------------------------------------------
sage -t --long --warn-long 47.7 --random-seed=192217669321149031373225857314451720597 src/sage/rings/number_field/number_field_element.pyx  # 1 doctest failed
----------------------------------------------------------------------

CC: @kliem

Component: number fields

Author: Jonathan Kliem

Branch/Commit: ca99e34

Reviewer: Marc Mezzarobba

Issue created by migration from https://trac.sagemath.org/ticket/33015

[kliem]

comment:2

@vbraun: Did you notice #32761.

You might want to set SAGE_DOCTEST_RANDOM_SEED to zero for the buildbots so that you don't have to worry about those random failures.

[kliem]

Commit: ca99e34

[kliem]

Author: Jonathan Kliem

[kliem]

New commits:

ca99e34

fix random failure in number_field_element.pyx

[kliem]

Branch: public/33015

[mezzarobba]

Reviewer: Marc Mezzarobba

[kliem]

comment:5

Thank you.

[slel]

comment:6

Setting milestone to 9.6 now that 9.5 is out.

[vbraun]

Changed branch from public/33015 to ca99e34