I don't fully understand the situation at hand, but let me add some background.
From the log it seems fairly clear that `lib6.preinst` is the thing that fails here. It adds two diversions: dpkg-divert --quiet --add --no-rename --package base-files --divert "/.${rtlddir#/}.usr-is-merged" "$rtlddir" dpkg-divert --quiet --add --no-rename --divert "$rtlddir/$rtld_so.usr-is-merged" "$rtlddir/$rtld_so" It seems fairly implausible that the "$rtlddir/$rtld_so" would become a directory for any reason. If that were the case, `dpkg-divert` (being a dynamic executable) would fail to start. Most likely, it is the first diversion that fails here. Since the package at hand is `:amd64`, `rtlddir=/lib64`. So for some reason, `/lib64` is a directory on your installation and not a symbolic link. In effect, this is (at least partially) an unmerged system and this is unsupported. This still is a bug in the sense that the error message is very confusing. `libc6.preinst` should probably be verifying that `$rtlddir` really is a symbolic link before adding the diversion. In the end, the outcome would be the same: When `$rtlddir` is not a symbolic link, all that `libc6.preinst` can do is fail (with a better error message). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2058648 Title: package libc6 2.35-0ubuntu3.6 [modified: usr/share/doc/libc6/NEWS.Debian.gz usr/share/doc/libc6/NEWS.gz usr/share/doc/libc6/README.hesiod.gz usr/share/doc/libc6/changelog.Debian.gz usr/share/lintian/overrides/libc6] failed to install/upgrade: new libc6:amd64 package pre-installation script subprocess returned error exit status 2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/2058648/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs