Comment 1 for bug 1790468

I installed Kubuntu 18.10 in a virtual vmware machine and activated lvm2.
After installing and rebooting I see again the wrong error message in recovery mode / system summary.
I guess this is the Package wants to do:

root@virtfred:~# pvck /dev/sda1
File descriptor 24 (socket:[32480]) leaked on pvck invocation. Parent PID 1896: -su
  Found label on /dev/sda1, sector 1, type=LVM2 001
  Found text metadata area: offset=4096, size=1044480

But this is what it does:
root@virtfred:~# pvck
File descriptor 24 (socket:[32480]) leaked on pvck invocation. Parent PID 1896: -su
  No command with matching syntax recognised. Run 'pvck --help' for more information.
  Correct command syntax is:
  pvck PV ...

If the installation is done without active lvm, but package lvmw2 is installed, you will see the wrong error too.