[gentoo-user] portage failed to upgrade

[Space Cake]

Hi,

For a few days my routine upgrades failing at portage with the following
message. Do you have any idea what does it means?

File
"/var/tmp/portage/sys-apps/portage-2.1.10.11/image/usr/lib/portage/pym/portage/tests/runTests",
line 21, in <module>
    os.environ["PORTAGE_GRPNAME"] = grp.getgrgid(os.getgid()).gr_name
KeyError: 'getgrgid(): gid not found: 0'

I've tried to google this, but nothing has found

Thank you
Laszlo