Public bug reported:

In Ubuntu 12.04.5 LTS (procps 1:3.2.8-11ubuntu6.3), the following worked
fine:

$ export PS_FORMAT=thcount
$ ps
THCNT
    1
    1

In Ubuntu 14.04.1 LTS (procps 1:3.3.9-1ubuntu2), it does not work
anymore:

$ export PS_FORMAT=thcount
$ ps
warning: $PS_FORMAT ignored. (unknown user-defined format specifier "thcount")
  PID TTY          TIME CMD
 6593 pts/1    00:00:00 ps
16633 pts/1    00:00:00 bash

Other PS_FORMAT specifiers still work fine (I have tried many, but not
all).

In real-life usage, a more complex PS_FORMAT would of course be used,
such as
PS_FORMAT=pid,s,thcount,nice,euser,egroup,etime,cputime,%mem,rssize:6,size:7,vsize:7,command

Workaround: use nlwp instead of thcount (they are alias to the same
data, and nlwp works fine in both versions).

** Affects: procps (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1410558

Title:
  PS_FORMAT=thcount does not work anymore

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