Le mercredi 25 novembre 2020 à 13:35:31 UTC+1, Sébastien Labbé a écrit :

> On Ubuntu 18.04, running tests with various optional and external 
> packages, I get:
>
> Using 
> --optional=4ti2,cbc,ccache,cryptominisat,database_jones_numfield,debian,dot2tex,e_antic,external,fricas,glucose,latte_int,libnauty,lidia,lrslib,memlimit,normaliz,notedown,pandoc_attributes,pip,pycosat,pynormaliz,rst2ipynb,sage,sage_numerical_backends_coin,sage_spkg
> ----------------------------------------------------------------------
> sage -t --long --warn-long 56.3 --random-seed=0 
> src/sage/interfaces/singular.py  # Killed due to segmentation fault
> ----------------------------------------------------------------------
> External software detected for doctesting: 
> ffmpeg,graphviz,imagemagick,internet,latex,octave,pandoc
>
> I can reproduce it when running the command:
> sage -t --long --warn-long 73.3 --random-seed=0 
> src/sage/interfaces/singular.py
>

I confirm the seg fault on Ubuntu 20.04 (Sage 9.3.beta2 built with the 
system Python = 3.8.5, but with Sage's singular = 4.1.1p2).
On the same computer (Intel Core i7-8665U + 32 GB RAM), the issue is 
already there with Sage 9.2, but not with Sage 9.1.

Eric.

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