After being assured by a maintainer that the problems in upgrading were fixed
in -7, I upgraded, without a hitch ... except now everything segfaults, even
after reboot. I had also upgraded x-windows stuff dependent on that which made
things even worse.
Actually, the reboot proceeds perfectly. Only when I log on and have a shell
(i.e. bash, sh) does everything crash out. So the bug might be there and not
in the libc6-7!
Anyway, a long haul to get a working system again. After copying /lib stuff
from the live-cd so I had a shell, I downgraded to testing, libc6-4 and more
than enough of the x stuff. Finally got back in and KDE was a mess.
To reinstall that, I needed to "upgrade" all the now-broken packages. This
time, I was smarter. I copied the working /lib, upgraded, segfaulted, went
into the live CD, copied the working /lib back and rebooted and reinstalled a
bunch of kde and plasma-desktop stuff (apt thought it was up-to-date haha).
Voile.
Since this is now a mixed-up system (until Sid's maintainers get stuff
together, completely, responsibly (posting defective /lib upgrades is
inexcusable because of the mess made for us Debian Sid users!), there may
still be problems, i.e. another package or two to downgrade.
Problem 1: Trying a normal synaptic upgrade of some programs, I got errors
that UTF8 could not be converted to latin1... and it aborted. Apt-get does
work (in a non-X terminal) because I did that with the KDE stuff. So what
package needs be up/down-graded to fix the character conversions?
Hint: reportbug-ng yields messages like:
QIconvCodec::convertFromUnicode: using Latin-1 for conversion, iconv failed
for BOM: Bad file descriptor
QIconvCodec::convertFromUnicode: using Latin-1 for conversion, iconv_open
failed
QIconvCodec::convertToUnicode: using Latin-1 for conversion, iconv_open failed