Unattended upgrades does not report some updates that can't be installed automatically

[Simon Arlott]

When there are packages that fail a "sanity check" they are not reported [by email] as expected. This results in updates being ignored indefinitely.

More details: https://github.com/mvo5/unattended-upgrades/issues/223

This is fixed in version 1.18 but bionic is using version 1.1: https://github.com/mvo5/unattended-upgrades/pull/255

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: unattended-upgrades 1.1ubuntu1.18.04.14
Uname: Linux 5.4.108+ x86_64
ApportVersion: 2.20.9-0ubuntu7.24
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun May 30 10:14:02 2021
InstallationDate: Installed on 2014-05-10 (2576 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: unattended-upgrades
UpgradeStatus: Upgraded to bionic on 2018-11-24 (917 days ago)
modified.conffile..etc.apt.apt.conf.d.10periodic: [modified]
modified.conffile..etc.apt.apt.conf.d.50unattended-upgrades: [modified]
mtime.conffile..etc.apt.apt.conf.d.10periodic: 2015-03-22T09:10:38.530578
mtime.conffile..etc.apt.apt.conf.d.50unattended-upgrades: 2021-05-14T10:28:25.361164