Public bug reported:

[Impact]
The kill binary will segfault when called w/ a single, negative PID. This 
breaks a use case where you maybe sending the default signal (SIGTERM) to all 
processes (-1) or all processes in a process group (-<PGID). This is regression 
introduced via an SRU to fix LP: #1637026.

[Test Case]
$ /bin/kill -9
Segmentation fault (core dumped)

[Regression Risk]
This fix will now make our optparsing almost identical to current yakkety, for 
which I see no obvious regressions filed.

** Affects: procps (Ubuntu)
     Importance: High
     Assignee: dann frazier (dannf)
         Status: Fix Released

** Affects: procps (Ubuntu Xenial)
     Importance: High
     Assignee: dann frazier (dannf)
         Status: In Progress

** Also affects: procps (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: procps (Ubuntu Xenial)
     Assignee: (unassigned) => dann frazier (dannf)

** Changed in: procps (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: procps (Ubuntu Xenial)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1643084

Title:
  [REGRESSION] kill segfaults w/ single, negative PID

Status in procps package in Ubuntu:
  Fix Released
Status in procps source package in Xenial:
  In Progress

Bug description:
  [Impact]
  The kill binary will segfault when called w/ a single, negative PID. This 
breaks a use case where you maybe sending the default signal (SIGTERM) to all 
processes (-1) or all processes in a process group (-<PGID). This is regression 
introduced via an SRU to fix LP: #1637026.

  [Test Case]
  $ /bin/kill -9
  Segmentation fault (core dumped)

  [Regression Risk]
  This fix will now make our optparsing almost identical to current yakkety, 
for which I see no obvious regressions filed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1643084/+subscriptions

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