During recovery system startup start-udev-or-load-modules.sh shows some "grep ... broken pipe" error

[jsmeix]

Every now and then I noticed during
recovery system startup a message that looks like
"grep ... broken pipe" error
but very quickly it disappears (blanked screen).

I never noticed any real failure because of this
so that this issue is perhaps only cosmetic
or at most a minor bug from my point of view.

Today by luck I think I noticed the script:
40-start-udev-or-load-modules.sh
which contains only two grep calls:

# grep 'grep' usr/share/rear/skel/default/etc/scripts/system-setup.d/40-start-udev-or-load-modules.sh

systemd_version=$( systemd-notify --version 2>/dev/null | grep systemd | awk '{ print $2; }' )

    if ps ax | grep -v grep | grep -q systemd-udevd ; then