Bug#984884: libgcrypt20: Unknown error executing apt-key [Bullseye]

[Andreas Metzler]

On 2021-09-09 Mateusz Rejek <mateusz.rejek at gmail.com> wrote:
> Interestingly enough got the same problem on ARMHF after moving to bullseye.

> I have version 1.8.7-6 installed over 1.8.4-5+deb10u1

> # cat /var/log/dpkg.log.1 | grep libgcrypt
> > 2021-09-07 13:07:54 upgrade libgcrypt20:armhf 1.8.4-5+deb10u1 1.8.7-6
> > 2021-09-07 13:07:54 status half-configured libgcrypt20:armhf
> > 1.8.4-5+deb10u1
> > 2021-09-07 13:07:54 status unpacked libgcrypt20:armhf 1.8.4-5+deb10u1
> > 2021-09-07 13:07:54 status half-installed libgcrypt20:armhf 1.8.4-5+deb10u1
> > 2021-09-07 13:07:54 status unpacked libgcrypt20:armhf 1.8.7-6
> > 2021-09-07 13:07:54 configure libgcrypt20:armhf 1.8.7-6 <none>
> > 2021-09-07 13:07:54 status unpacked libgcrypt20:armhf 1.8.7-6
> > 2021-09-07 13:07:54 status half-configured libgcrypt20:armhf 1.8.7-6
> > 2021-09-07 13:07:54 status installed libgcrypt20:armhf 1.8.7-6

[...]
> # ls -al /lib/arm-linux-gnueabihf/libgcrypt.so.20
> > lrwxrwxrwx 1 root root 19 Sep  7 14:30
> > /lib/arm-linux-gnueabihf/libgcrypt.so.20 -> libgcrypt.so.20.0.3

[...]
> IMO problem is coming from libgcrypt moving in Debian 11 from
> /lib/arm-linux-gnueabihf/ to /usr/lib/arm-linux-gnueabihf/ and leaving old
> lib behind

The left behind file (libgcrypt.so.20.0.3) is from libgcrypt20 1.6.3 so
the actual error (dpkg failing to remove an file on upgrade) happened a
lot earlier. 1.6.3 was shipped in Debian8/jessie.

cu Andreas