Hi John, hi Samuel,

On 2019-03-27, John H Palmieri <jhpalmier...@gmail.com> wrote:
>> Regarding the failures in src/sage/tests/modular_group_cohomology.py 
>> related to the optional package p_group_cohomology (details follow), 
>> can others confirm?

I've not seen it. The folder in which certain gap and singular library
files were installed by p_group_cohomology did change in the disctant
past, but I think it did not change in the last couple of versions.

>> Is there a fix? Should I install extra libraries 
>> for Singular?

No. The file that cannot be found (dickson.lib) is part of
p_group_cohomology.

>> What is the proper way to uninstall the optional package 
>> p_group_cohomology if I need an installation that passes all tests 
>> (say, to run a patchbot)? 
>
> "make p_group_cohomology-clean"  should uninstall the package.

Nice, I didn't know that this works. But since p_group_cohomology's
installation is based on autotools (for one subpackage) and pip (for the
main part of the package), uninstallation should in principle be
supported out of the box. I just didn't know how to "open" that box
using Sage...

Best regards,
Simon

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