After `make distclean`, I managed to let make complete correctly. So on Ubuntu 18.04 with few optional and external packages installed, running tests gives
Running doctests with ID 2022-02-16-13-33-33-bf595c7c.
Git branch: develop
Using --optional=4ti2,build,ccache,cryptominisat,debian,dot2tex,e_antic,external,fricas,glucose,latte_int,lidia,normaliz,notedown,pandoc_attributes,pip,pycosat,pynormaliz,rst2ipynb,sage,sage_numerical_backends_coin,sage_spkg
Features to be detected: 4ti2,benzene,bliss,buckygen,conway_polynomials,cplex,csdp,database_cremona_ellcurve,database_cremona_mini_ellcurve,database_jones_numfield,database_knotinfo,dvipng,ffmpeg,graphviz,gurobi,imagemagick,internet,jupymake,kenzo,latex,latex_package_tkz_graph,latte_int,lrslib,lualatex,macaulay2,magma,maple,mathematica,matlab,mcqd,meataxe,octave,pandoc,pdf2svg,pdflatex,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,scilab,sphinx,tdlib,xelatex
[...]
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sage -t --long --random-seed=17221948269536709498924172128130603585 src/sage/combinat/designs/incidence_structures.py # 1 doctest failed
sage -t --long --random-seed=17221948269536709498924172128130603585 src/sage/graphs/generic_graph.py # 2 doctests failed
sage -t --long --random-seed=17221948269536709498924172128130603585 src/sage/graphs/graph.py # 3 doctests failed
sage -t --long --random-seed=17221948269536709498924172128130603585 src/sage/tests/cmdline.py # 1 doctest failed
----------------------------------------------------------------------
Features detected for doctesting: dvipng,ffmpeg,graphviz,imagemagick,internet,latex,latex_package_tkz_graph,lualatex,octave,pandoc,pdf2svg,pdflatex,pdftocairo,sage.combinat,sage.geometry.polyhedron,sage.graphs,sage.groups,sage.plot,sage.rings.number_field,sage.rings.padics,sage.rings.real_double,sage.symbolic,sagemath_doc_html,sphinx,xelatex
When reproducing the tests, I get:
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sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/combinat/designs/incidence_structures.py # 1 doctest failed
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/graphs/generic_graph.py # 2 doctests failed
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/graphs/graph.py # 2 doctests failed
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/tests/cmdline.py # 1 doctest failed
----------------------------------------------------------------------
Features detected for doctesting: graphviz,internet,latex,pandoc,sage.groups,sage.symbolic
I copy paste the failures below. No now failures. Follow-up at
https://trac.sagemath.org/ticket/25536sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/combinat/designs/incidence_structures.py
**********************************************************************
File "src/sage/combinat/designs/incidence_structures.py", line 2042, in sage.combinat.designs.incidence_structures.IncidenceStructure.?
Failed example:
len(designs.steiner_triple_system(7).coloring())
Expected:
3
Got:
2
**********************************************************************
1 item had failures:
1 of 35 in sage.combinat.designs.incidence_structures.IncidenceStructure.?
8 gap_packages tests not run
3 not tested tests not run
0 tests not run because we ran out of time
[339 tests, 1 failure, 1.16 s]
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/graphs/generic_graph.py
**********************************************************************
File "src/sage/graphs/generic_graph.py", line 8975, in sage.graphs.generic_graph.GenericGraph.nowhere_zero_flow
Failed example:
h = g.nowhere_zero_flow(k=3)
Expected:
...
EmptySetError: the problem has no feasible solution
Got:
<BLANKLINE>
**********************************************************************
File "src/sage/graphs/generic_graph.py", line 9603, in sage.graphs.generic_graph.GenericGraph.?
Failed example:
p1,p2 = g.disjoint_routed_paths([((0, 0), (4, 4)), ((0, 4), (4, 0))])
Expected:
...
EmptySetError: the disjoint routed paths do not exist
Got:
<BLANKLINE>
**********************************************************************
2 items had failures:
1 of 1092 in sage.graphs.generic_graph.GenericGraph.?
1 of 29 in sage.graphs.generic_graph.GenericGraph.nowhere_zero_flow
17 bliss tests not run
6 not tested tests not run
38 python_igraph tests not run
0 tests not run because we ran out of time
[3684 tests, 2 failures, 35.67 s]
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/graphs/graph.py
**********************************************************************
File "src/sage/graphs/graph.py", line 4271, in sage.graphs.graph.Graph.?
Failed example:
g.has_homomorphism_to(graphs.CycleGraph(4)) is not False
Expected:
False
Got:
True
**********************************************************************
File "src/sage/graphs/graph.py", line 4678, in sage.graphs.graph.Graph.minor
Failed example:
L = g.minor(graphs.CompleteGraph(3))
Expected:
...
ValueError: This graph has no minor isomorphic to H !
Got:
<BLANKLINE>
**********************************************************************
2 items had failures:
1 of 279 in sage.graphs.graph.Graph.?
1 of 14 in sage.graphs.graph.Graph.minor
2 mcqd tests not run
2 not tested tests not run
13 python_igraph tests not run
0 tests not run because we ran out of time
[1216 tests, 2 failures, 25.05 s]
sage -t --long --random-seed=128719743142658761791632862209348634600 src/sage/tests/cmdline.py
**********************************************************************
File "src/sage/tests/cmdline.py", line 606, in sage.tests.cmdline.test_executable
Failed example:
err # optional - internet
Expected:
''
Got:
'/home/slabbe/GitBox/sage/local/var/lib/sage/venv-python3.8/lib/python3.8/site-packages/sage/misc/package.py:119: UserWarning: failed to fetch the version of pkg=\'ore_algebra\' at
https://pypi.org/pypi/ore_algebra/json\n warnings.warn("failed to fetch the version of pkg={!r} at {}".format(pkg, url))\n'
**********************************************************************