On Mon, Jun 12, 2023 at 11:24:00AM +0200, Bastien Durel wrote: > > During bookworm upgrade, I ran into some usrmerge failures, which led > to an hard-to-fix situation > > Paramétrage de usrmerge (35) ... > > FATAL ERROR: > Both /lib/x86_64-linux-gnu/libidn.so.11 and > /usr/lib/x86_64-linux-gnu/libidn.so.11 exist. > > You can try correcting the errors reported and running again > /usr/lib/usrmerge/convert-usrmerge until it will complete without errors. > Do not install or update other Debian packages until the program > has been run successfully. > > E: usrmerge failed.
Well, that's somewhat terrifying. I looked at bugs.debian.org/usrmerge and didn't see any bugs like this already reported. Next, I wondered about reproducing this with a minimal system. So I looked at debootstrap. But as it turns out, debootstrap gives you a system with an already-merged /usr, so it's not helpful in setting up a minimal chroot-able system where we can try to reproduce the failure. According to <https://wiki.debian.org/UsrMerge> one would need a version of debootstrap between 1.0.87 and 1.0.101, and according to <https://packages.debian.org/debootstrap> even buster has version 1.0.114. I think I might try grabbing an older-than-buster version of debootstrap out of snapshot.debian.org and see if I can manage to reproduce something. But don't count on my success.
