Description of problem:

When I call pvs, vgs or lvs from scripts in a bash command substitution, then I get an error of the following form for each invocation of these commands:

File descriptor 3 (/tmp/sh-thd-871826097) leaked on pvs invocation. Parent PID 1769: /bin/bash

For example, I call these commands in a command substitution to include the result in the body of an e-mail. See Steps to Reproduce.


Version-Release number of selected component (if applicable):
lvm2-2.02.167-3.fc25.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Create a shell script "mailtestscript" with following content:

#!/bin/bash

    Mail -s "mail test with pvs vgs lvs" myname <<EOF

LVM physical volumes:
`pvs`

LVM volume groups:
`vgs`

LVM logical volumes:
`lvs`

EOF


2. Substitute "myname" by a valid e-mail address of your own (to receive the e-mail which the script will send).

3. Make the script executable:
   chmod u+x mailtestscript

4. Run the script:
   ./mailtestscript

Actual results:

Output of the script are messages like this:

File descriptor 3 (/tmp/sh-thd-871866956) leaked on pvs invocation. Parent PID 6142: /bin/bash
File descriptor 3 (/tmp/sh-thd-871866956) leaked on vgs invocation. Parent PID 6142: /bin/bash
File descriptor 3 (/tmp/sh-thd-871866956) leaked on lvs invocation. Parent PID 6142: /bin/bash

It sends an e-mail (as expected).


Expected results:

The script should print nothing to standard out and standard error.
It should send only an e-mail.

Additional info:

This happens at least since a longer time, at least since Fedora 24, maybe even on previous version. I have not reported is until now because the commands have been working as expected, besides of these error message.