Bug#887425: upgrade-reports: fails in keys in trusted.gpg

[Stanislav <skipastas@gmail.com>]

Package: upgrade-reports
Severity: important

Dear Maintainer,

After upgrade my system from Stretch to Buster I always see this messages:
W: http://security.debian.org/dists/buster/updates/InRelease: The key(s) in the
keyring /etc/apt/trusted.gpg are ignored as the file has an unsupported
filetype.
W: http://deb.debian.org/debian/dists/buster/InRelease: The key(s) in the
keyring /etc/apt/trusted.gpg are ignored as the file has an unsupported
filetype.
W: http://deb.debian.org/debian/dists/buster-updates/InRelease: The key(s) in
the keyring /etc/apt/trusted.gpg are ignored as the file has an unsupported
filetype.
W: http://packages.microsoft.com/repos/vscode/dists/stable/InRelease: The
key(s) in the keyring /etc/apt/trusted.gpg are ignored as the file has an
unsupported filetype.

MOreover, now I am unable to upgrade my system from Synaptic or Applications
but looks like updating from the terminal works relatively well.


I am really sorry if I send it to the wrong address.





-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8), LANGUAGE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled