Hello Helmut,
  Thankyou for your bug report.  git bisect analysis shows that upstream
commit 52673d2fc7e012f5134cdfafb6d319450b3a40a3 [1] is the cause of your
problem as reported; or is for at least the -p option.
I must admit having an initial look at this commit, nothing stands out that
says "this is a problem", but here we are. It will need some further
checking to see why it is breaking skill.

 - Craig

1:
https://gitlab.com/procps-ng/procps/commit/52673d2fc7e012f5134cdfafb6d319450b3a40a3


On Wed, 11 Jul 2018 at 16:12 Helmut Grohne <hel...@subdivi.de> wrote:

> Package: procps
> Version: 2:3.3.15-2
> Severity: important
>
> snice/skill don't seem to work at all here anymore. Dowgrading to
> 2:3.3.12-4 fixes the problems. Let me give some examples:
>
>  * Command: sh -c 'skill -p $$; echo still alive'
>    Expected outcome: "Terminated"
>    Actual outcome: "still alive"
>
>  * Command: sh -c 'snice +1 -v -c perl'
>    Expected outcome: nicing the one perl process started on the other
>                      terminal
>    Actual outcome: no output, no effect
>
>  * Command: skill -v -u someuser (as root)
>    Expected outcome: killing all processes of that user
>    Actual outcome: no output, processes continue to live
>
> Helmut
>
-- 
Craig Small             https://dropbear.xyz/     csmall at : dropbear.xyz
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