On Ubuntu 16.04 with the default texlive install, the pdf documentation
fails to build:
./sage -docbuild reference/algebras pdf
results in
(/usr/share/texlive/texmf-dist/tex/latex/jknapltx/mathrsfs.sty)
! LaTeX Error: File `iftex.sty' not found.
On the same machine, the pdf build is OK for
On Debian testing running on Core i7 + 16 GB RAM, ptestlong incurs three
transient failures :
--
sage -t --long src/sage/modular/modform/element.py # Timed out
sage -t --long src/sage/homology/simplicial_complex.py # 1 doctest
