This bug can be reproduced if you have Debian-exim user in /etc/password, but do not have Debian-exim group in /etc/group. For this to occur, it must be removed manually from /etc/group, as groupdel will reject saying that it cannot remove user's primary group.
This bug can be reproduced if you have Debian-exim user in /etc/password, but do not have Debian-exim group in /etc/group. For this to occur, it must be removed manually from /etc/group, as groupdel will reject saying that it cannot remove user's primary group.