[DSE-Dev] Bug#979970: libselinux1: dependency to newer libc6 ignored by/missing for aptitude

[Laurent Bigonville]

reassign 979970 src:glibc 2.30-1
affects 979970 + libselinux1
thanks

On Tue, 12 Jan 2021 13:31:19 +0100 Charlemagne Lasse 
<charlemagnelasse at gmail.com> wrote:

 > Right now, an update from buster to bullseye on amd64 completely
 > bricks the system because libselinux1 is requiring a libc6 which is
 > not yet installed on the system:
 >
 > Preparing to unpack .../0-libselinux1_3.1-2+b2_amd64.deb ...
 > De-configuring libselinux1:i386 (2.8-1+b1) ...
 > Unpacking libselinux1:amd64 (3.1-2+b2) over (2.8-1+b1) ...
 > tar: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.30' not
 > found (required by /lib/x86_64-linux-gnu/libselinux.so.1)
 > dpkg-deb: error: tar subprocess returned error exit status 1
 >
 > It is then not possible anymore to recover the system because dpkg
 > (mv, ...) is no longer working.
 >
 > There is most likely some kind dependency missing to let aptitude
 > known that it must first update libc6 before it can update
 > libselinux1. At least on this system, the installed version of libc6
 > for amd64 and i386 was still 2.28-10 when this happened

After some discussion on IRC it looks like the problem is apparently 
coming from the breaks added to the libc6 package.

I personally cannot reproduce this in chroot