I'll review the new PR, though I probably should have seen this problem
arising with the original one.

John

On Fri, 16 Jun 2023 at 09:30, Dima Pasechnik <dimp...@gmail.com> wrote:

> You can't reopen PRs, I think, you can certainly reopen issues.
>
> No need to fill in the longish PR boilerplate, just remove it and write
> what it does, mentioning #35626
>
>
>
> On Fri, 16 Jun 2023, 09:08 chris wuthrich, <christian.wuthr...@gmail.com>
> wrote:
>
>> I replaced old tests with "random" by new ones with "random" (and forgot
>> these two). Some other tests do check consistency.
>>
>> All that the function really does is converting a pari output back into a
>> point on the elliptic curve. Therefore the test checks if pari runs without
>> error and if the returned is a point on the curve. Checking if it is a
>> generator modulo torsion would be checking if pari gets this right. Is that
>> what we should do?
>>
>> But this discussing should happen on a pull request. I repeat my
>> question: Do I open a new one or is the faulty initial one reopened? (Trac
>> tickets used to be reopened, that is why I ask).
>>
>> Chris
>>
>> On Friday, 16 June 2023 at 01:39:46 UTC+1 tsc...@ucdavis.edu wrote:
>>
>>> I don't think it should be random; that has the chance of hiding actual
>>> bugs. I think we should check that it belongs to a particular set
>>> (specifically, the one from John's comment).
>>>
>>> Best,
>>> Travis
>>>
>>>
>>> On Thursday, June 15, 2023 at 5:15:52 AM UTC+9 chris wuthrich wrote:
>>>
>>>> I agree with John. Lines 2380 and 2388 need a "random output" for that
>>>> reason, like the other calls of that function have already.
>>>> Is this a new pull request or is the old #35626
>>>> https://github.com/sagemath/sage/pull/35626 opened again for
>>>> corrections?
>>>>
>>>> Chris
>>>>
>>>> On Wednesday, 14 June 2023 at 17:49:21 UTC+1 John Cremona wrote:
>>>>
>>>>> On Tue, 13 Jun 2023 at 17:06, John Cremona <john.c...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> The elliptic curve failure might be a consequence of the recently
>>>>>> merged PR #35626 about using libpari to compute ranks and generators.
>>>>>>
>>>>>> I'll take a look to at least see if the output you get is
>>>>>> mathematically correct -- generators are not unique.
>>>>>>
>>>>>
>>>>> I was right. This curve has rank 1 and torsion (Z/2Z)^2 so if P is one
>>>>> generator (of infinte order) then there are 3 other, P+T for T a point of
>>>>> order 2.  The one your are getting is one of these.
>>>>>
>>>>> So we conclude that we cannot reply on pari always returning the same
>>>>> generator despite random seeds etc being fixed in doctests.  I don't know
>>>>> why that is, but if it is the case then this (and other similar) doctests
>>>>> will have to be written accordingly.
>>>>>
>>>>>
>>>>>>
>>>>>> John
>>>>>>
>>>>>>
>>>>>> On Tue, 13 Jun 2023, 17:00 Emmanuel Charpentier, <
>>>>>> emanuel.c...@gmail.com> wrote:
>>>>>>
>>>>>>> On Debian testing running on core i7 + 16 GB RAM, upgrading
>>>>>>> 10.1.beta2 to 10.1.beta3 and rinning ptestlong gives 3 permanent 
>>>>>>> failures :
>>>>>>> ----------------------------------------------------------------------
>>>>>>> sage -t --long --warn-long 207.1
>>>>>>> --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/schemes/elliptic_curves/ell_rational_field.py # 1 doctest 
>>>>>>> failed
>>>>>>> sage -t --long --warn-long 207.1
>>>>>>> --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/coding/linear_code.py # 2 doctests failed sage -t --long
>>>>>>> --warn-long 207.1 --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/coding/code_constructions.py # 1 doctest failed
>>>>>>> ----------------------------------------------------------------------
>>>>>>>
>>>>>>> The last two have been already reported a few times, and seem
>>>>>>> cosmetic. The first one is new and seemingly *not* cosmetic :
>>>>>>> charpent@zen-book-flip:/usr/local/sage-10$ sage -t --long
>>>>>>> --warn-long 207.1 --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/schemes/elliptic_curves/ell_rational_field.py # 1 doctest 
>>>>>>> failed
>>>>>>> Running doctests with ID 2023-06-13-17-49-08-8dac2a23. Git branch: 
>>>>>>> develop
>>>>>>> Git ref: 10.1.beta0-453-g443b7549ad Running with
>>>>>>> SAGE_LOCAL='/usr/local/sage-10/local' and
>>>>>>> SAGE_VENV='/usr/local/sage-10/local/var/lib/sage/venv-python3.11' Using
>>>>>>> --optional=debian,dot2tex,fricas,gap_jupyter,gap_packages,libsemigroups,msolve,pip,pysingular,sage,sage_spkg,singular_jupyter
>>>>>>> Features to be detected:
>>>>>>> 4ti2,benzene,bliss,buckygen,conway_polynomials,csdp,cvxopt,cvxopt,database_cremona_ellcurve,database_cremona_mini_ellcurve,database_cubic_hecke,database_jones_numfield,database_knotinfo,dvipng,fpylll,gfan,graphviz,imagemagick,ipython,jupymake,kenzo,latte_int,lrcalc_python,lrslib,mcqd,meataxe,mpmath,msolve,nauty,networkx,numpy,palp,pandoc,pdf2svg,pdftocairo,pexpect,phitigra,pillow,plantri,polytopes_db,polytopes_db_4d,pplpy,primecountpy,ptyprocess,pynormaliz,pyparsing,python_igraph,requests,rubiks,sage.combinat,sage.geometry.polyhedron,sage.graphs,sage.groups,sage.libs.gap,sage.libs.pari,sage.libs.singular,sage.misc.cython,sage.modules,sage.plot,sage.rings.finite_rings,sage.rings.function_field,sage.rings.number_field,sage.rings.padics,sage.rings.real_double,sage.rings.real_mpfr,sage.symbolic,sage_numerical_backends_coin,sagemath_doc_html,scipy,singular,sphinx,sympy,tdlib
>>>>>>> Doctesting 1 file. sage -t --long --warn-long 207.1
>>>>>>> --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/schemes/elliptic_curves/ell_rational_field.py
>>>>>>> ********************************************************************** 
>>>>>>> File
>>>>>>> "src/sage/schemes/elliptic_curves/ell_rational_field.py", line 2380, in
>>>>>>> sage.schemes.elliptic_curves.ell_rational_field.EllipticCurve_rational_field.?
>>>>>>> Failed example: E.gens(use_database=False, 
>>>>>>> algorithm="pari",pari_effort=4)
>>>>>>> Expected: [(611429153205013185025/9492121848205441 :
>>>>>>> 15118836457596902442737698070880/924793900700594415341761 : 1)] Got:
>>>>>>> [(-38749202011873484470143/306317326339867638016 :
>>>>>>> 678721624672968530804232808604865/5361142413550167706041194328064 : 1)]
>>>>>>> ********************************************************************** 1
>>>>>>> item had failures: 1 of 100 in
>>>>>>> sage.schemes.elliptic_curves.ell_rational_field.EllipticCurve_rational_field.?
>>>>>>> [896 tests, 1 failure, 241.41 s]
>>>>>>> ---------------------------------------------------------------------- 
>>>>>>> sage
>>>>>>> -t --long --warn-long 207.1
>>>>>>> --random-seed=291812591553963182024849035945523427319
>>>>>>> src/sage/schemes/elliptic_curves/ell_rational_field.py # 1 doctest 
>>>>>>> failed
>>>>>>> ----------------------------------------------------------------------
>>>>>>> Total time for all tests: 251.7 seconds cpu time: 227.0 seconds 
>>>>>>> cumulative
>>>>>>> wall time: 241.4 seconds Features detected for doctesting:
>>>>>>> sage.rings.finite_rings,sage.rings.number_field
>>>>>>>
>>>>>>> HTH,
>>>>>>> Le dimanche 11 juin 2023 à 13:14:49 UTC+2, 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
>>>>>>>>
>>>>>>>> 443b7549ad3 (tag: 10.1.beta3, github/develop) Updated SageMath
>>>>>>>> version to 10.1.beta3
>>>>>>>> 464d3d20aaa gh-35738: configure: Remove stray `stdin.info` file
>>>>>>>> created in test
>>>>>>>> d27b19a4efc gh-35737: build/pkgs/maxima: Fix parallel build
>>>>>>>> 202ccd7ea08 gh-35733: more uses of yield from
>>>>>>>> aba52d4c06a gh-35731: build/pkgs/pyflakes: Remove
>>>>>>>> 5b446283d86 gh-35723: some pep8 cleanup in rigged-configurations
>>>>>>>> e90d6be7a5c gh-35722: cython-lint for imports in libs/
>>>>>>>> 9c83f604a46 gh-35721: cython-lint for imports in rings (mostly in
>>>>>>>> padics)
>>>>>>>> 5c9ee290848 gh-35720: fix the linter and add more checks
>>>>>>>> 6d1cb7e3323 gh-35718: `sage.graphs`: More modularization
>>>>>>>> a2e4cab86c8 gh-35714: provide matrix_symbolic_sparse class
>>>>>>>> 41aa6c290de gh-35713: update symengine(_py) to versions 0.10.0 and
>>>>>>>> 0.10.1
>>>>>>>> acac1e60e63 gh-35712: fix pep8 E251 in rings/
>>>>>>>> 34b4234573c gh-35711: fix all pep8 E251 in combinat
>>>>>>>> 0a929ff9da9 gh-35710: fix pep8 E251 in categories, coding, crypto,
>>>>>>>> logic
>>>>>>>> 6a142317110 gh-35709: some cython-linting in quadratic forms
>>>>>>>> d7bb52abf83 gh-35702: GAP: switch some code to use official libgap
>>>>>>>> APIs
>>>>>>>> afc9232bff4 gh-35692: ⬆️ Bump myrotvorets/set-commit-status-action
>>>>>>>> from 1.1.6 to 1.1.7
>>>>>>>> 6ca634ae1c0 gh-35671: Upgrade networkx to 3.1, igraph/python_igraph
>>>>>>>> to 0.10.4
>>>>>>>> 7e0eb1c9219 gh-35666: remove obsolete .zenodo.json* files, update
>>>>>>>> CITATION.cff to fix zenodo/DOI
>>>>>>>> 86d2be056bf gh-35626: Update  the rank function of elliptic curves
>>>>>>>> to use ellrank in pari
>>>>>>>> fe931a790a8 gh-35614: allow non-minimal equation for padic heights
>>>>>>>> 5343f2e7ea9 gh-35494: avoid computation of Conway polynomials when
>>>>>>>> comparing elliptic-curve morphisms
>>>>>>>> 2f426a11f4c (tag: 10.1.beta2) Updated SageMath version to 10.1.beta2
>>>>>>>>
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>>>>>>>
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