Bug#555644: Work around for libc6: fails to update
2009/11/12 S H Mohanjith <firstname.lastname@example.org>:
> I was faced with the same issue and I followed what Andreas Beckmann
> has suggested. Like Andreas Beckmann I was stuck with an error code
> between 100-106 (104 in my case). I manged to upgrade libc6 by
> commenting out set -e in /var/lib/dpkg/info/libc6.postinst and
> /var/lib/dpkg/info/libc6.preinst (2nd line).
Thank you very much, indeed it helped me pass over this hurdle...