It definitely looks like you have a newer nauty kicking in here.
The fix is to make the test more generic - after all it tests an error message!

Dima


On 5 September 2024 19:04:27 BST, John H Palmieri <[email protected]> 
wrote:
>I think this is a new failure. Could it be due to an upgraded system 
>package?
>
>sage -t --random-seed=232711236884461766258917891173593419501 
>src/sage/graphs/generators/families.py
>**********************************************************************
>File "src/sage/graphs/generators/families.py", line 3712, in 
>sage.graphs.generators.families.nauty_gentreeg
>Failed example:
>    list(graphs.nauty_gentreeg("3 -x", debug=True))
>Expected:
>    ['>E Usage: ...gentreeg [-D#] [-Z#:#] [-ulps] [-q] n [res/mod] ...
>Got:
>    ['>E Usage: gentreeg [-D#] [-Z#:#] [-ulps] [-q] n|n1:n2 [res/mod] 
>[file]\n']
>
>On Tuesday, September 3, 2024 at 3:23:56 PM UTC-7 Volker Braun wrote:
>
>> 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
>>
>> 24698e7e7ec (github/develop, tag: 10.5.beta3) Updated SageMath version to 
>> 10.5.beta3
>> b9cb7bc2559 gh-38567: Documentation: Remove traces of Trac
>> 74d1ace4244 gh-38566: fix __iter__ method for point homsets
>> 9864710a085 gh-38563: Tutorial: Remove remarks on Python 2 integers
>> 38705bfc554 gh-38562: ⬆️ Bump tj-actions/changed-files from 44 to 45
>> 35e0c666b01 gh-38561: Period lattice: fix documentation error
>> f1645d8a07f gh-38554: Fix conda environments after `build` was removed 
>> from conda-forge in favor of `python-build`
>> 75eaef2cec4 gh-38553: Fix `DiGraph.dig6_string` when the digraph has loops
>> 4b4dc825ac9 gh-38549: Prepare sage for sphinx 8
>> 36ca3da69c6 gh-38546: use Parent in Hecke algebras
>> 1abea468a0b gh-38538: catch xgcd crash in flint nmod
>> 50954f00a69 gh-38535: fix issue 38527 with `spqr_tree_to_graph`
>> 677a1203abc gh-38534: `build/pkgs/tachyon`: Fix rpath
>> 5b55d0de6ee gh-38524: Sort #34892 doctest output vectors to fix randomness
>> 2c30b35b406 gh-38523: CI Linux: Strip timestamps printed by docker buildkit
>> 6a47b933886 gh-38522: `build/pkgs/libpng`: Update to 1.6.43
>> 5d2e55ed979 gh-38521: Fix `sage_bootstrap.flock` for Python 3.13 
>> (fedora-41)
>> ebf8b8e8954 gh-38519: GH Actions: Upload PyPI sdists also as GitHub 
>> Release Assets
>> 114523a47bc gh-38518: CI Linux: Consolidate jobs
>> 3666cac19a1 gh-38517: GH Actions: Create a GitHub release also for beta 
>> and rc
>> 57e992008a5 gh-38516: avoid using reserved min and max in two files
>> 0fa08defaa1 gh-38515: `src/pyproject.toml`: Add missing build dep `jinja2`
>> 3d6600a0ccc gh-38513: various details in arithgroup_generic
>> 3b3acd950ce gh-38512: details in moment-angle complex
>> 545353511c6 gh-38507: some code details in asymptotic
>> 3f9d9eb1fca gh-38506: fixing all pep E302 warnings in folders [a-c]*
>> 806fd1853c9 gh-38505: Update list of Apple Silicon processors
>> 7dc68c532d3 gh-38503: Reviewer guide: Link to Eric Gourgoulhon's test 
>> notebook
>> a615ae01c8b gh-38502: deprecate the class "Algebra"
>> 14c0b0c89ae gh-38500: cython 3.0.11 compatibility
>> 1c4f8d55d8f gh-38499: CI / `tox docker-incremental`: Fix incremental build 
>> from a different Sage version
>> e0b30f98a71 gh-38497: minor details in categories folder
>> acc412ae960 gh-38496: CI: Update `centos-stream-9`, add `fedora-41`
>> 33cb4881535 gh-38491: Add _latex_ method for hyperelliptic curves
>> 60f381636d2 gh-38490: prevent crash in order_from_multiple() due to 
>> rounding error
>> ecea5cb2a12 gh-38488: implement smooth_part() and coprime_part()
>> b3c8a329628 gh-38485: Updated SPKG links for polymake as per #37532
>> 1d9ac179d62 gh-38477: fix many pep8 E302 warnings in 
>> repl,rings,schemes,sat,etc
>> 60957acbb51 gh-38468: Fix buggy doc diff script
>> d7837bc4cdf gh-38465: using pathlib.Path around SAGE_EXTCODE
>> bd776a37e86 gh-38463: replace use of gp interface by pari lib in 3 files
>> 71c5e25643f gh-38462: get rid of sage_eval in cfinite_sequence
>> d01a8cea26f gh-38459: Fix coercion error on constant arguments to HypJac 
>> point construction
>> 2da5607f091 gh-38445: some typos
>> 4c8fdb7ea52 gh-38361: EllipticCurve: Raise error on unexpected keyword 
>> argument
>> e88b194a410 gh-38306: Reduce outdated `gdb` and `valgrind` packages to 
>> dummy packages
>> e9b9d32433a gh-38291: Implement a custom class for tropical polynomials
>> 8ba0b849bdb gh-38267: ⬆️ Bump docker/build-push-action from 5 to 6
>> fc80abe0084 gh-38224: `configure --disable-notebook`: Also disable 
>> `jupyter_sphinx`
>> 5d3a5d73f2c gh-38183: `build/pkgs/cypari` 2.2.0
>> 0ec42d170c4 gh-37761: rings/infinite polynomial ring fixes
>> 5ee375c1acf gh-37434: Document building from the monorepo using 
>> `PIP_CONSTRAINT=$SAGE_ROOT/constraints_pkgs.txt`
>> 4dffe20e50e gh-37204: upgrade shipped suitesparse components to 7.8.0
>> 100189fa62f gh-36641: `build/pkgs/sympy`: Upgrade to 1.13.2
>> 28ee8abe79b gh-34962: set reverse=True by default in 
>> basis_for_quaternion_lattice()
>> e042294b5ed (tag: 10.5.beta2) Updated SageMath version to 10.5.beta2
>>
>>
>
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