On Debian testing running on Core i7 + 16 GB RAM, ptestlong gives two 
failures :

----------------------------------------------------------------------
sage -t --long src/sage/rings/function_field/function_field.py  # Timed out
sage -t --long src/sage/libs/gap/assigned_names.py  # 1 doctest failed
----------------------------------------------------------------------

The second one is transient (succeeds when ran standalone). The first one 
may be genuine :

charpent@asus16-ec:/usr/local/sage-8$ sage -t --long 
src/sage/rings/function_field/function_field.py
too many failed tests, not using stored timings
Running doctests with ID 2017-08-14-12-17-29-2464ab86.
Git branch: develop
Using --optional=database_gap,giacpy_sage,git_trac,mpir,python2,sage
Doctesting 1 file.
sage -t --long src/sage/rings/function_field/function_field.py
    [458 tests, 677.75 s]
----------------------------------------------------------------------
All tests passed!
----------------------------------------------------------------------
Total time for all tests: 677.8 seconds
    cpu time: 677.5 seconds
    cumulative wall time: 677.7 seconds

677 seconds is, indeed, an alarming time, and might well be larger than the 
(unknown to me) timeout threshold. It might be useful to divide this in 
subtasks, but is this possible ?

HTH,

--
Emmanuel Charpentier

Le lundi 14 août 2017 00:28:06 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
>
> effcedb Updated SageMath version to 8.1.beta2
> 9e9bcc2 Trac #23492: Graph automorphism: Remove a warning block
> 49de1ee Trac #23027: Error in conflict resolution documentation
> e7bd1ac Trac #13591: Improve padic add_bigoh
> c35929e Trac #23597: More use for master bib; order of examples and seealso
> 8a6670e Trac #23495: R[x]→S[x] is injective/surjective if R→S is
> 5a2a9dc Trac #23456: Compute Gauss sums with Gross-Koblitz formula
> f215b82 Trac #23210: immediate dominators and strong articulation points
> cb5106c Trac #23611: Fix coercion in polynomial division
> 062356f Trac #23607: Matrix.__str__: always show the entries
> 0bdf464 Trac #23598: __bool__ for free modules
> cd152cc Trac #22400: Transpose text databases of reflexive polytopes for 
> PALP
> d9b1fe8 Trac #21124: Real/Complex number str() method: do not truncate by 
> default and allow specifying number of digits
> 6fdc7c4 Trac #23185: A polynomial ring embeds into its fraction field
> 947c2a4 Trac #8423: Add code to plot Julia sets
> 59727a3 Trac #23606: Add some abstract methods to Laurent polynomials base 
> class
> 21f9dce Trac #23603: Fix cpdef declaration issues in modular and number 
> fields
> 028ab58 Trac #23592: Faster comparison of manifold points
> f8edd55 Trac #23591: py3: more absolute imports in pyx files
> 3445b62 Trac #23589: py3: adding absolute imports in many pyx files
> 3e1577d Trac #23588: py3 : small changes in unicode art and ascii_art
> 0a404b5 Trac #23584: some details in misc/misc.py
> cc6f721 Trac #23551: Python 3 print in doctests
> 13fe81e Trac #23543: Upgrade PARI to 2.9.3
> c1bc6d3 Trac #23499: Compute conductor of abelian fields
> e52d022 Trac #23491: Don't use MethodType to assign methods to a class
> 115a65d Trac #23408: py3: richcmp for algebraic closures of finite fields
> 6d0d1b3 Trac #23375: Cannot pull back from PBW basis to Lie algebra
> 23718e4 Trac #23329: Implement characteristic() for ring of coordinate 
> functions
> a88a6e6 Trac #23227: Add cpdef declarations in pxd files when overwriting 
> a cdef method
> fc058c7 Trac #22951: Integrated curves and geodesics on manifolds
> 527e4d3 Trac #22588: Let "make doc" really always work
> 886ed8d Trac #20310: change for p-adic rings
> 44fba6b Trac #14153: Add Unicode support to the doctesting framework
> 8ca3ace Trac #23604: Fix spkg scripts for deformation package
> 2e35d4b Trac #23574: Typos of doubled word / part 3
> bb4c2a0 Trac #23485: Ring morphisms should not override __richcmp__
> fb6e3fa7 Trac #23484: Zmod(nm) → Zmod(n) is surjective but not injective
> 6b553b5 Trac #23483: ZZ → Zmod is surjective but not injective
> d856e57 Trac #23481: Fix typo in is_surjective
> df0584c Trac #20300: DirichletGroup should not allow negative modulus
> c759d8b Trac #23455: Removing notes directory
> c3371e9 Trac #23396: Typos of doubled word / part 2
> 104fd87 Trac #23393: Typos where where a word word is doubled
> 09c0e42 Trac #23340: Unify test: vs. tests::
> 46b1023 Trac #23558: More use for PackageNotFoundError
> 563d51e Trac #23548: a load of typos
> e21c7ef Trac #23532: Update links in Three.js examples
> af2799c Trac #23526: bad syntax in trac role and raise
> 73f6c84 Trac #23525: implement is_squarefree for p-adic rings
> cfca4df Trac #23512: Update Dokchitser's L-function script
> 15fce90 Trac #23509: Find all completely split primes in a number field up 
> to some bound
> 6ca42ad Trac #23493: Posets: Some crosslinks etc.
> df12771 Trac #23482: Identities are injective and surjective
> 6d98588 Trac #23457: allow infinity in __init__ for projective points
> 5681c8d Trac #23441: better ascii and unicode art for plane partitions
> 5f40e09 Trac #23474: Make is_galois work for higher degree number fields
> e77531e Updated SageMath version to 8.1.beta1
>
>

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