The SystemError: calling remove_from_pari_stack() inside sig_on() 
in cycliccover_finite_field.py is https://trac.sagemath.org/ticket/33304
On Tuesday, March 1, 2022 at 11:00:26 AM UTC+1 [email protected] wrote:

> FWIW, on Debian testing running on core i7 + 16 GB RAM, upgrading 
> 9.6.beta1 to 9.6.beta3 and running ptestlong gets me one temporary 
> failure :
>
> sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 
> src/sage/schemes/cyclic_covers/cycliccover_finite_field.py  # 1 doctest failed
>
> and one permanent failure :
>
> sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 src/sage/graphs/graph.py 
>  # 1 doctest failed
>
> The second one seems to be numerical noise :
>
> charpent@zen-book-flip:/usr/local/sage-9$ sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 src/sage/graphs/graph.py 
>  # 1 doctest failed
> Running doctests with ID 2022-03-01-10-43-41-a97dd6df.
> Git branch: develop
> Using 
> --optional=debian,dot2tex,fricas,gap_packages,libsemigroups,pip,sage,sage_spkg
> Features to be detected: 
> 4ti2,benzene,bliss,buckygen,conway_polynomials,csdp,database_cremona_ellcurve,database_cremona_mini_ellcurve,database_jones_numfield,database_knotinfo,dvipng,graphviz,imagemagick,jupymake,kenzo,latte_int,lrslib,mcqd,meataxe,pandoc,pdf2svg,pdftocairo,plantri,pynormaliz,python_igraph,rubiks,sage.combinat,sage.geometry.polyhedron,sage.graphs,sage.groups,sage.plot,sage.rings.number_field,sage.rings.padics,sage.rings.real_double,sage.symbolic,sage_numerical_backends_coin,sagemath_doc_html,sphinx,tdlib
> Doctesting 1 file.
> sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 src/sage/graphs/graph.py
> **********************************************************************
> File "src/sage/graphs/graph.py", line 8586, in 
> sage.graphs.graph.Graph.effective_resistance
> Failed example:
>     H.effective_resistance(1, 5, base_ring=RDF)
> Expected:
>     1.20000...
> Got:
>     1.1999999999999997
> **********************************************************************
> 1 item had failures:
>    1 of  22 in sage.graphs.graph.Graph.effective_resistance
>     [1233 tests, 1 failure, 20.14 s]
> ----------------------------------------------------------------------
> sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 src/sage/graphs/graph.py 
>  # 1 doctest failed
> ----------------------------------------------------------------------
> Total time for all tests: 20.3 seconds
>     cpu time: 18.7 seconds
>     cumulative wall time: 20.1 seconds
> Features detected for doctesting: sage.groups,sage.symbolic
> Pytest is not installed, skip checking tests that rely on it.
>
> but I have no easy explanation for the first (temporary) one, whose 
> ptestlong.log record is as follows :
>
> sage -t --long --warn-long 245.4 
> --random-seed=61034896171412036953396016057425531267 
> src/sage/schemes/cyclic_covers/cycliccover_finite_field.py
> **********************************************************************
> File "src/sage/schemes/cyclic_covers/cycliccover_finite_field.py", line 1139, 
> in 
> sage.schemes.cyclic_covers.cycliccover_finite_field.CyclicCover_finite_field.frobenius_polynomial
> Failed example:
>     CyclicCover(11, PolynomialRing(GF(1129), 'x')([-1] + [0]*(5-1) + 
> [1])).frobenius_polynomial() # long time
> Exception raised:
>     Traceback (most recent call last):
>       File "sage/misc/cachefunc.pyx", line 1943, in 
> sage.misc.cachefunc.CachedMethodCaller.__call__ 
> (build/cythonized/sage/misc/cachefunc.c:10410)
>         return cache[k]
>     KeyError: ((11,), ())
>
>     During handling of the above exception, another exception occurred:
>
>     Traceback (most recent call last):
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/doctest/forker.py",
>  line 694, in _run
>         self.compile_and_execute(example, compiler, test.globs)
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/doctest/forker.py",
>  line 1088, in compile_and_execute
>         exec(compiled, globs)
>       File "<doctest 
> sage.schemes.cyclic_covers.cycliccover_finite_field.CyclicCover_finite_field.frobenius_polynomial[23]>",
>  line 1, in <module>
>         CyclicCover(Integer(11), PolynomialRing(GF(Integer(1129)), 
> 'x')([-Integer(1)] + [Integer(0)]*(Integer(5)-Integer(1)) + 
> [Integer(1)])).frobenius_polynomial() # long time
>       File "sage/misc/cachefunc.pyx", line 2310, in 
> sage.misc.cachefunc.CachedMethodCallerNoArgs.__call__ 
> (build/cythonized/sage/misc/cachefunc.c:13020)
>         self.cache = f(self._instance)
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/schemes/cyclic_covers/cycliccover_finite_field.py",
>  line 1234, in frobenius_polynomial
>         F = self.frobenius_matrix(self._N0)
>       File "sage/misc/cachefunc.pyx", line 1948, in 
> sage.misc.cachefunc.CachedMethodCaller.__call__ 
> (build/cythonized/sage/misc/cachefunc.c:10546)
>         w = self._instance_call(*args, **kwds)
>       File "sage/misc/cachefunc.pyx", line 1824, in 
> sage.misc.cachefunc.CachedMethodCaller._instance_call 
> (build/cythonized/sage/misc/cachefunc.c:10012)
>         return self.f(self._instance, *args, **kwds)
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/schemes/cyclic_covers/cycliccover_finite_field.py",
>  line 1072, in frobenius_matrix
>         FrobP = _frobenius_matrix_p(self._N0)
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/schemes/cyclic_covers/cycliccover_finite_field.py",
>  line 1068, in _frobenius_matrix_p
>         ] = self._frob(i, j + self._epsilon * self._r, N0)
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/schemes/cyclic_covers/cycliccover_finite_field.py",
>  line 994, in _frob
>         self._initialize_fat_horizontal(
>       File 
> "/usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/schemes/cyclic_covers/cycliccover_finite_field.py",
>  line 738, in _initialize_fat_horizontal
>         DH = [elt[0, 0] for elt in interval_products(D0, D1, targets)]
>       File "sage/schemes/hyperelliptic_curves/hypellfrob.pyx", line 140, in 
> sage.schemes.hyperelliptic_curves.hypellfrob.interval_products 
> (build/cythonized/sage/schemes/hyperelliptic_curves/hypellfrob.cpp:3999)
>         sig_on()
>     SystemError: calling remove_from_pari_stack() inside sig_on()
> **********************************************************************
> 1 item had failures:
>    1 of  60 in 
> sage.schemes.cyclic_covers.cycliccover_finite_field.CyclicCover_finite_field.frobenius_polynomial
>
> *Of note :* this ptestlong run, on a lightly loaded laptop freshly 
> rebooted, entailed a very high use of memory : it used about 18 GB of swap 
> file above the 16 GB of RAM. I don’t remember seeing such an high RAM usage 
> during ptestlong of the previous versions.
>
> HTH,
> ​
> Le lundi 28 février 2022 à 01:37:39 UTC+1, Volker Braun a écrit :
>
>> As always, you can get the latest beta version from the "develop" git 
>> branch. Alternatively, the self-contained source tarball is at 
>> http://www.sagemath.org/download-latest.html
>>
>>
>> 1e8ba0aac4 (trac/develop, tag: 9.6.beta3) Updated SageMath version to 
>> 9.6.beta3
>> 0fed9a145e Trac #33392: sage.matrix: Modularization fixes after #33159
>> 5f2efac091 Trac #33391: Remove compile dependency on flint from 
>> CombinatorialPolyhedron
>> 4761943a1b Trac #33389: GenericGraph.distance_matrix: accept keyword 
>> arguments for matrix constructor
>> de4f3f05e3 Trac #33388: Graph: accept keyword arguments for matrix 
>> constructor in methods returning a matrix
>> 4c814d6649 Trac #33387: BipartiteGraph.reduced_adjacency_matrix: accept 
>> keyword arguments for matrix constructor
>> 9b24711f58 Trac #33386: MR55: Make orders unique parents
>> ef3270f669 Trac #33376: Apply some coding conventions to 
>> sage/modular/overconvergent/hecke_series.py
>> 57787eddf1 Trac #33371: Remove sage-location and NEW_SAGE_ROOT code
>> a7eabd143a Trac #33272: Update sphinx to 4.4
>> 70a841107e Trac #33194: openblas: Update to 0.3.20
>> 714cf9fe3a Trac #33165: faster evaluation of polynomials in R[x] at 
>> monomials in R[y] or R[u,v] and variables in R[x]/(f)
>> 5649402da8 Trac #33001: Invoke manifolds with structure more conveniently
>> 3454122b2e Trac #32958: findstat: enforce limit on how many elements to 
>> compute
>> cd78e1bb53 Trac #32953: Sphere: improve handling of default charts
>> ef15b5575a Trac #32847: Use lazy_import for module-level import from 
>> sage.plot (outside of sage.plot)
>> f2ed106a91 Trac #32688: Matrix_dense API functions set_unsafe_si vs. 
>> set_unsafe_int
>> 590cfa95d0 Trac #32644: Typos in documentation of 
>> sage/modular/quasimodform
>> 39b19e63df Trac #32121: Generalize MapCombinatorialClass to 
>> ImageSubobject/ImageSet, add method Map.image
>> ff4fc3f93f Trac #31576: Projective points over rings with zero divisors
>> ebbf07248d Trac #31355: upgrade lrcalc to 2.1
>> 2c35e81943 Trac #30680: Finitely presented modules over the Steenrod 
>> algebra
>> 02bde440d3 Trac #29927: shifting issue in padic _set_from_list functions
>> 5f4c2c49b8 Trac #29919: Restore "huge" package type
>> 8c5f78c826 Trac #22081: Add new option to hyperbolic graphics to select 
>> the model
>> 72b70cb269 Trac #14147: weyl group orbit of a weight hangs in infinite 
>> type
>> 47b7c6cbce Trac #33390: singular spkg-configure.m4: Better test for help
>> 58e2a16d8c Trac #33390: singular spkg-configure.m4: Better test for help
>> b96b86a4bc Trac #33377: GenericGraph.[weighted]adjacency_matrix, 
>> incidence_matrix: Accept keyword arguments for matrix constructor
>> 5705d221fd Trac #33374: adjust error messages in algebras/
>> f71a59cf4d Trac #33367: Adjust some error messages in `combinat/`
>> d2b071e65f Trac #33364: remove traces of # py3 and some # py2
>> 518f9fc106 Trac #33358: Fix for rename of conda e-antic package to 
>> libeantic
>> 7abda14ee4 Trac #33357: Random set partition with fixed block sizes does 
>> not respect the constraint and other improvements
>> b17a291d87 Trac #33353: increase tolerance of doctests in 
>> modular/modform/numerical.py
>> bfa90bbd18 Trac #33351: raw docs and other pycodestyle details in some 
>> pyx files
>> 09c55f3d97 Trac #33349: a few details in designs
>> ed86487af3 Trac #33342: fix indentation in toy_variety.py
>> 2fd405438b Trac #33341: pycodestyle cleaning in convolution.py
>> 016f864459 Trac #33336: Fix deprecation warning with scipy 1.8.
>> a64514b5ce Trac #33335: fix E111 (indentation) in geometry, groups, 
>> logic, matrix
>> aa255bf264 Trac #33334: fix E111 (indentation) in rings
>> b35def6864 Trac #33333: Deduplicate package names in installation guide
>> df13563584 Trac #33332: fix E111 (indentation) in dynamics, numerical, 
>> modules, interfaces
>> fd2d77c807 Trac #33328: Some improvements for signed permutations
>> 9d77db7871 Trac #33323: Cardinality of partitions of negative values
>> 567da5a2d4 Trac #33309: Make Sage documentation functional
>> 70505410c7 Trac #33247: Restore quiet in `./configure -q`
>> 56c6240253 Trac #33149: use lazy_string() for string formatting when 
>> creating exceptions
>> 5bf1f88d7b Trac #32465: Refactor {Matrix,Vector}_double_dense through 
>> ..._numpy_dense, add ..._numpy_integer_dense
>> 72f573e606 Trac #30649: Reimplement "sage -p SPKG" as "cd $SAGE_ROOT && 
>> make SPKG-no-deps"
>> 9941688328 Trac #33150: more direct conversion from QQbar to real and 
>> complex ball fields
>> d08b099239 Trac #33127: Fix warning about missing sage-site when 
>> SAGE_ROOT is removed after installation
>> f456256a0a Trac #33100: is_positive_definite returns wrong results
>> ca6ac0bcd0 Trac #33054: conda-forge (linux): primecount fails to install
>> 347ee9349c Trac #32987: Deprecate sage.misc.misc.sage_makedirs
>> 433e4d9eb2 Trac #30252: Make TensorProducts of finite-dimensional modules 
>> / vector spaces finite-dimensional
>> 29b0897532 Trac #32965: tox / GH Actions: Add 
>> centos-7-devtoolset-gcc_{9,10,11}
>> 15c8011dd0 (tag: 9.6.beta2) Updated SageMath version to 9.6.beta2
>>
>

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