Bug#920482: apt update fails to update from repository missing optional Contents files

To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: Bug#920482: apt update fails to update from repository missing optional Contents files
From: Andrew Worsley <amworsley@gmail.com>
Date: Sat, 26 Jan 2019 12:39:16 +1100
Message-id: <[🔎] 154846675641.17520.13216300222202351926.reportbug@localhost>
Reply-to: Andrew Worsley <amworsley@gmail.com>, 920482@bugs.debian.org
Package: apt
Version: 1.8.0~alpha3.1
Severity: important


  I maintain a mirror via a local python script which doesn't bother to cache the optional
Contents files as described in
https://wiki.debian.org/DebianRepository/Format#A.22Contents.22_indices :
	
    "They are optional indices describing which files can be found in which packages"

  But whilst my debian stretch box happily upgrades my stretch mirror my buster
mirror is no longer wanting to upgrade my testing box.

  If I add a URL for my mirror and an official mirror ftp.au.debian.org and do an update
it appears to fail to update from my mirror complaining about the missing Contents file:

% sudo apt update
[sudo] password for amw:
Get:1 http://azza/debs/buster buster InRelease [159 kB]
Get:2 http://azza/debs/buster buster/main amd64 Packages [10.6 MB]
Get:3 http://azza/debs/buster buster/main Translation-en [5,966 kB]
Get:4 http://azza/debs/buster buster/main amd64 Contents (deb) [36.5 MB]
Get:4 http://azza/debs/buster buster/main amd64 Contents (deb) [36.5 MB]
Get:4 http://azza/debs/buster buster/main amd64 Contents (deb) [36.5 MB]
Get:4 http://azza/debs/buster buster/main amd64 Contents (deb) [36.5 MB]
Ign:4 http://azza/debs/buster buster/main amd64 Contents (deb)
Ign:9 http://azza/debs/buster buster/contrib amd64 Contents (deb)
Ign:10 http://azza/debs/buster buster/non-free amd64 Contents (deb)
Err:4 http://azza/debs/buster buster/main amd64 Contents (deb)
  404  Not Found [IP: 10.0.0.51 80]
Ign:9 http://azza/debs/buster buster/contrib amd64 Contents (deb)
Ign:10 http://azza/debs/buster buster/non-free amd64 Contents (deb)
Hit:11 http://ftp.au.debian.org/debian buster InRelease
Fetched 159 kB in 2s (67.0 kB/s)
Reading package lists... Done
E: Failed to fetch http://azza/debs/buster/dists/buster/main/Contents-amd64  404  Not Found [IP: 10.0.0.51 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

   Even though my mirror has that up to date version of the packages and the InRelease
   and Packages.gz files are up to date and list the new version of packages won't
   install it from my mirror.

% apt-cache policy vim
vim:
  Installed: 2:8.1.0549-1
  Candidate: 2:8.1.0693-2
  Version table:
     2:8.1.0693-2 500
        500 http://ftp.au.debian.org/debian buster/main amd64 Packages
 *** 2:8.1.0549-1 100
        100 /var/lib/dpkg/status

   It appears the Error on the Contents file prevents the azza repository Package data
   from being loaded?

   This appears to be a recent problem - i.e. the last couple of weeks.

   I have not changed my mirror script to start mirroring Contents file to confirm
   this is the key difference. If Content files are meant to be mandatory now could
   the Wiki page be updated?

   I tried asking on the #debian-apt IRC but got no answer so raising a bugreport

   	Thanks

		Andrew

-- Package-specific info:

-- apt-config dump --

APT "";
APT::Architecture "amd64";
APT::Build-Essential "";
APT::Build-Essential:: "build-essential";
APT::Install-Recommends "1";
APT::Install-Suggests "0";
APT::Sandbox "";
APT::Sandbox::User "_apt";
APT::Authentication "";
APT::Authentication::TrustCDROM "true";
APT::NeverAutoRemove "";
APT::NeverAutoRemove:: "^firmware-linux.*";
APT::NeverAutoRemove:: "^linux-firmware$";
APT::NeverAutoRemove:: "^linux-image-[a-z0-9]*$";
APT::NeverAutoRemove:: "^linux-image-[a-z0-9]*-[a-z0-9]*$";
APT::NeverAutoRemove:: "^linux-image-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-image-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-headers-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-headers-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-image-extra-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-image-extra-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-modules-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-modules-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-modules-extra-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-modules-extra-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-signed-image-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-signed-image-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-image-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-image-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-headers-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-headers-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^gnumach-image-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^gnumach-image-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^.*-modules-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^.*-modules-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^.*-kernel-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^.*-kernel-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-backports-modules-.*-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-backports-modules-.*-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-modules-.*-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-modules-.*-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-tools-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-tools-4\.19\.0-1-amd64$";
APT::NeverAutoRemove:: "^linux-cloud-tools-4\.18\.0-3-amd64$";
APT::NeverAutoRemove:: "^linux-cloud-tools-4\.19\.0-1-amd64$";
APT::VersionedKernelPackages "";
APT::VersionedKernelPackages:: "linux-image";
APT::VersionedKernelPackages:: "linux-headers";
APT::VersionedKernelPackages:: "linux-image-extra";
APT::VersionedKernelPackages:: "linux-modules";
APT::VersionedKernelPackages:: "linux-modules-extra";
APT::VersionedKernelPackages:: "linux-signed-image";
APT::VersionedKernelPackages:: "kfreebsd-image";
APT::VersionedKernelPackages:: "kfreebsd-headers";
APT::VersionedKernelPackages:: "gnumach-image";
APT::VersionedKernelPackages:: ".*-modules";
APT::VersionedKernelPackages:: ".*-kernel";
APT::VersionedKernelPackages:: "linux-backports-modules-.*";
APT::VersionedKernelPackages:: "linux-modules-.*";
APT::VersionedKernelPackages:: "linux-tools";
APT::VersionedKernelPackages:: "linux-cloud-tools";
APT::Never-MarkAuto-Sections "";
APT::Never-MarkAuto-Sections:: "metapackages";
APT::Never-MarkAuto-Sections:: "contrib/metapackages";
APT::Never-MarkAuto-Sections:: "non-free/metapackages";
APT::Never-MarkAuto-Sections:: "restricted/metapackages";
APT::Never-MarkAuto-Sections:: "universe/metapackages";
APT::Never-MarkAuto-Sections:: "multiverse/metapackages";
APT::Move-Autobit-Sections "";
APT::Move-Autobit-Sections:: "oldlibs";
APT::Move-Autobit-Sections:: "contrib/oldlibs";
APT::Move-Autobit-Sections:: "non-free/oldlibs";
APT::Move-Autobit-Sections:: "restricted/oldlibs";
APT::Move-Autobit-Sections:: "universe/oldlibs";
APT::Move-Autobit-Sections:: "multiverse/oldlibs";
APT::Update "";
APT::Update::Post-Invoke-Success "";
APT::Update::Post-Invoke-Success:: "test -x /usr/bin/apt-show-versions || exit 0 ; apt-show-versions -i";
APT::Architectures "";
APT::Architectures:: "amd64";
APT::Compressor "";
APT::Compressor::. "";
APT::Compressor::.::Name ".";
APT::Compressor::.::Extension "";
APT::Compressor::.::Binary "";
APT::Compressor::.::Cost "0";
APT::Compressor::zstd "";
APT::Compressor::zstd::Name "zstd";
APT::Compressor::zstd::Extension ".zst";
APT::Compressor::zstd::Binary "false";
APT::Compressor::zstd::Cost "60";
APT::Compressor::lz4 "";
APT::Compressor::lz4::Name "lz4";
APT::Compressor::lz4::Extension ".lz4";
APT::Compressor::lz4::Binary "lz4";
APT::Compressor::lz4::Cost "50";
APT::Compressor::lz4::CompressArg "";
APT::Compressor::lz4::CompressArg:: "-1";
APT::Compressor::lz4::UncompressArg "";
APT::Compressor::lz4::UncompressArg:: "-d";
APT::Compressor::gzip "";
APT::Compressor::gzip::Name "gzip";
APT::Compressor::gzip::Extension ".gz";
APT::Compressor::gzip::Binary "gzip";
APT::Compressor::gzip::Cost "100";
APT::Compressor::gzip::CompressArg "";
APT::Compressor::gzip::CompressArg:: "-6n";
APT::Compressor::gzip::UncompressArg "";
APT::Compressor::gzip::UncompressArg:: "-d";
APT::Compressor::xz "";
APT::Compressor::xz::Name "xz";
APT::Compressor::xz::Extension ".xz";
APT::Compressor::xz::Binary "xz";
APT::Compressor::xz::Cost "200";
APT::Compressor::xz::CompressArg "";
APT::Compressor::xz::CompressArg:: "-6";
APT::Compressor::xz::UncompressArg "";
APT::Compressor::xz::UncompressArg:: "-d";
APT::Compressor::bzip2 "";
APT::Compressor::bzip2::Name "bzip2";
APT::Compressor::bzip2::Extension ".bz2";
APT::Compressor::bzip2::Binary "bzip2";
APT::Compressor::bzip2::Cost "300";
APT::Compressor::bzip2::CompressArg "";
APT::Compressor::bzip2::CompressArg:: "-6";
APT::Compressor::bzip2::UncompressArg "";
APT::Compressor::bzip2::UncompressArg:: "-d";
APT::Compressor::lzma "";
APT::Compressor::lzma::Name "lzma";
APT::Compressor::lzma::Extension ".lzma";
APT::Compressor::lzma::Binary "xz";
APT::Compressor::lzma::Cost "400";
APT::Compressor::lzma::CompressArg "";
APT::Compressor::lzma::CompressArg:: "--format=lzma";
APT::Compressor::lzma::CompressArg:: "-6";
APT::Compressor::lzma::UncompressArg "";
APT::Compressor::lzma::UncompressArg:: "--format=lzma";
APT::Compressor::lzma::UncompressArg:: "-d";
Dir "/";
Dir::State "var/lib/apt";
Dir::State::lists "lists/";
Dir::State::cdroms "cdroms.list";
Dir::State::extended_states "extended_states";
Dir::State::status "/var/lib/dpkg/status";
Dir::Cache "var/cache/apt";
Dir::Cache::archives "archives/";
Dir::Cache::srcpkgcache "srcpkgcache.bin";
Dir::Cache::pkgcache "pkgcache.bin";
Dir::Etc "etc/apt";
Dir::Etc::sourcelist "sources.list";
Dir::Etc::sourceparts "sources.list.d";
Dir::Etc::main "apt.conf";
Dir::Etc::netrc "auth.conf";
Dir::Etc::netrcparts "auth.conf.d";
Dir::Etc::parts "apt.conf.d";
Dir::Etc::preferences "preferences";
Dir::Etc::preferencesparts "preferences.d";
Dir::Etc::trusted "trusted.gpg";
Dir::Etc::trustedparts "trusted.gpg.d";
Dir::Etc::apt-file-main "apt-file.conf";
Dir::Bin "";
Dir::Bin::methods "/usr/lib/apt/methods";
Dir::Bin::solvers "";
Dir::Bin::solvers:: "/usr/lib/apt/solvers";
Dir::Bin::planners "";
Dir::Bin::planners:: "/usr/lib/apt/planners";
Dir::Bin::dpkg "/usr/bin/dpkg";
Dir::Bin::gzip "/bin/gzip";
Dir::Bin::bzip2 "/bin/bzip2";
Dir::Bin::xz "/usr/bin/xz";
Dir::Bin::lz4 "/usr/bin/lz4";
Dir::Bin::zstd "/usr/bin/zstd";
Dir::Bin::lzma "/usr/bin/xz";
Dir::Media "";
Dir::Media::MountPath "/media/cdrom";
Dir::Log "var/log/apt";
Dir::Log::Terminal "term.log";
Dir::Log::History "history.log";
Dir::Log::Planner "eipp.log.xz";
Dir::Ignore-Files-Silently "";
Dir::Ignore-Files-Silently:: "~$";
Dir::Ignore-Files-Silently:: "\.disabled$";
Dir::Ignore-Files-Silently:: "\.bak$";
Dir::Ignore-Files-Silently:: "\.dpkg-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.ucf-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.save$";
Dir::Ignore-Files-Silently:: "\.orig$";
Dir::Ignore-Files-Silently:: "\.distUpgrade$";
Acquire "";
Acquire::AllowInsecureRepositories "0";
Acquire::AllowWeakRepositories "0";
Acquire::AllowDowngradeToInsecureRepositories "0";
Acquire::cdrom "";
Acquire::cdrom::mount "/media/cdrom";
Acquire::IndexTargets "";
Acquire::IndexTargets::deb "";
Acquire::IndexTargets::deb::Packages "";
Acquire::IndexTargets::deb::Packages::MetaKey "$(COMPONENT)/binary-$(ARCHITECTURE)/Packages";
Acquire::IndexTargets::deb::Packages::flatMetaKey "Packages";
Acquire::IndexTargets::deb::Packages::ShortDescription "Packages";
Acquire::IndexTargets::deb::Packages::Description "$(RELEASE)/$(COMPONENT) $(ARCHITECTURE) Packages";
Acquire::IndexTargets::deb::Packages::flatDescription "$(RELEASE) Packages";
Acquire::IndexTargets::deb::Packages::Optional "0";
Acquire::IndexTargets::deb::Translations "";
Acquire::IndexTargets::deb::Translations::MetaKey "$(COMPONENT)/i18n/Translation-$(LANGUAGE)";
Acquire::IndexTargets::deb::Translations::flatMetaKey "$(LANGUAGE)";
Acquire::IndexTargets::deb::Translations::ShortDescription "Translation-$(LANGUAGE)";
Acquire::IndexTargets::deb::Translations::Description "$(RELEASE)/$(COMPONENT) Translation-$(LANGUAGE)";
Acquire::IndexTargets::deb::Translations::flatDescription "$(RELEASE) Translation-$(LANGUAGE)";
Acquire::IndexTargets::deb::Contents-deb "";
Acquire::IndexTargets::deb::Contents-deb::MetaKey "$(COMPONENT)/Contents-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-deb::ShortDescription "Contents-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-deb::Description "$(RELEASE)/$(COMPONENT) $(ARCHITECTURE) Contents (deb)";
Acquire::IndexTargets::deb::Contents-deb::flatMetaKey "Contents-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-deb::flatDescription "$(RELEASE) Contents (deb)";
Acquire::IndexTargets::deb::Contents-deb::PDiffs "true";
Acquire::IndexTargets::deb::Contents-deb::KeepCompressed "true";
Acquire::IndexTargets::deb::Contents-udeb "";
Acquire::IndexTargets::deb::Contents-udeb::MetaKey "$(COMPONENT)/Contents-udeb-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-udeb::ShortDescription "Contents-udeb-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-udeb::Description "$(RELEASE)/$(COMPONENT) $(ARCHITECTURE) Contents (udeb)";
Acquire::IndexTargets::deb::Contents-udeb::flatMetaKey "Contents-udeb-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-udeb::flatDescription "$(RELEASE) Contents (udeb)";
Acquire::IndexTargets::deb::Contents-udeb::KeepCompressed "true";
Acquire::IndexTargets::deb::Contents-udeb::PDiffs "true";
Acquire::IndexTargets::deb::Contents-udeb::DefaultEnabled "false";
Acquire::IndexTargets::deb::Contents-deb-legacy "";
Acquire::IndexTargets::deb::Contents-deb-legacy::MetaKey "Contents-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-deb-legacy::ShortDescription "Contents-$(ARCHITECTURE)";
Acquire::IndexTargets::deb::Contents-deb-legacy::Description "$(RELEASE) $(ARCHITECTURE) Contents (deb)";
Acquire::IndexTargets::deb::Contents-deb-legacy::PDiffs "true";
Acquire::IndexTargets::deb::Contents-deb-legacy::KeepCompressed "true";
Acquire::IndexTargets::deb::Contents-deb-legacy::Fallback-Of "Contents-deb";
Acquire::IndexTargets::deb::Contents-deb-legacy::Identifier "Contents-deb";
Acquire::IndexTargets::deb-src "";
Acquire::IndexTargets::deb-src::Sources "";
Acquire::IndexTargets::deb-src::Sources::MetaKey "$(COMPONENT)/source/Sources";
Acquire::IndexTargets::deb-src::Sources::flatMetaKey "Sources";
Acquire::IndexTargets::deb-src::Sources::ShortDescription "Sources";
Acquire::IndexTargets::deb-src::Sources::Description "$(RELEASE)/$(COMPONENT) Sources";
Acquire::IndexTargets::deb-src::Sources::flatDescription "$(RELEASE) Sources";
Acquire::IndexTargets::deb-src::Sources::Optional "0";
Acquire::IndexTargets::deb-src::Contents-dsc "";
Acquire::IndexTargets::deb-src::Contents-dsc::MetaKey "$(COMPONENT)/Contents-source";
Acquire::IndexTargets::deb-src::Contents-dsc::ShortDescription "Contents-source";
Acquire::IndexTargets::deb-src::Contents-dsc::Description "$(RELEASE)/$(COMPONENT) source Contents (dsc)";
Acquire::IndexTargets::deb-src::Contents-dsc::flatMetaKey "Contents-source";
Acquire::IndexTargets::deb-src::Contents-dsc::flatDescription "$(RELEASE) Contents (dsc)";
Acquire::IndexTargets::deb-src::Contents-dsc::PDiffs "true";
Acquire::IndexTargets::deb-src::Contents-dsc::KeepCompressed "true";
Acquire::IndexTargets::deb-src::Contents-dsc::DefaultEnabled "false";
Acquire::Changelogs "";
Acquire::Changelogs::URI "";
Acquire::Changelogs::URI::Origin "";
Acquire::Changelogs::URI::Origin::Debian "https://metadata.ftp-master.debian.org/changelogs/@CHANGEPATH@_changelog";;
Acquire::Changelogs::URI::Origin::Ubuntu "https://changelogs.ubuntu.com/changelogs/pool/@CHANGEPATH@/changelog";;
Acquire::Changelogs::AlwaysOnline "";
Acquire::Changelogs::AlwaysOnline::Origin "";
Acquire::Changelogs::AlwaysOnline::Origin::Ubuntu "1";
Acquire::CompressionTypes "";
Acquire::CompressionTypes::Order "";
Acquire::CompressionTypes::Order:: "gz";
Acquire::CompressionTypes::xz "xz";
Acquire::CompressionTypes::bz2 "bzip2";
Acquire::CompressionTypes::lzma "lzma";
Acquire::CompressionTypes::gz "gzip";
Acquire::CompressionTypes::lz4 "lz4";
Acquire::CompressionTypes::zst "zstd";
Acquire::Languages "";
Acquire::Languages:: "en";
Acquire::Languages:: "none";
DPkg "";
DPkg::Path "/usr/sbin:/usr/bin:/sbin:/bin";
DPkg::Pre-Install-Pkgs "";
DPkg::Pre-Install-Pkgs:: "adequate --help >/dev/null 2>&1 || exit 0; exec adequate --user nobody --apt-preinst";
DPkg::Pre-Install-Pkgs:: "/usr/sbin/dpkg-preconfigure --apt || true";
DPkg::Post-Invoke "";
DPkg::Post-Invoke:: "adequate --help >/dev/null 2>&1 || exit 0; exec adequate --debconf --user nobody --pending";
DPkg::Post-Invoke:: "test -x /usr/lib/needrestart/apt-pinvoke && /usr/lib/needrestart/apt-pinvoke || true";
DPkg::Tools "";
DPkg::Tools::Options "";
DPkg::Tools::Options::adequate "";
DPkg::Tools::Options::adequate::Version "2";
Adequate "";
Adequate::Enabled "false";
apt-file "";
apt-file::Index-Names "deb";
apt-file::Parser "";
apt-file::Parser::Check-For-Description-Header "false";
Binary "apt-config";
Binary::apt "";
Binary::apt::APT "";
Binary::apt::APT::Color "1";
Binary::apt::APT::Cache "";
Binary::apt::APT::Cache::Show "";
Binary::apt::APT::Cache::Show::Version "2";
Binary::apt::APT::Cache::AllVersions "0";
Binary::apt::APT::Cache::ShowVirtuals "1";
Binary::apt::APT::Cache::Search "";
Binary::apt::APT::Cache::Search::Version "2";
Binary::apt::APT::Cache::ShowDependencyType "1";
Binary::apt::APT::Cache::ShowVersion "1";
Binary::apt::APT::Get "";
Binary::apt::APT::Get::Upgrade-Allow-New "1";
Binary::apt::APT::Get::Update "";
Binary::apt::APT::Get::Update::InteractiveReleaseInfoChanges "1";
Binary::apt::APT::Cmd "";
Binary::apt::APT::Cmd::Show-Update-Stats "1";
Binary::apt::APT::Keep-Downloaded-Packages "0";
Binary::apt::DPkg "";
Binary::apt::DPkg::Progress-Fancy "1";
CommandLine "";
CommandLine::AsString "apt-config dump";

-- (no /etc/apt/preferences present) --


-- /etc/apt/preferences.d/azza --

Explanation: Get from local cache first
Package: *
#Pin: origin "azza"
#Pin: release n=stretch
#Pin-Priority: 500

-- (/etc/apt/preferences.d/limit-unstable present, but not submitted) --


-- /etc/apt/preferences.d/unstable --

Explanation: Hold testing stuff low priority
Package: *
Pin: release a=unstable
Pin-Priority: 50

-- (/etc/apt/sources.list present, but not submitted) --


-- (/etc/apt/sources.list.d/google-talkplugin.list present, but not submitted) --


-- (/etc/apt/sources.list.d/unstable-wireguard.list present, but not submitted) --


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

Kernel: Linux 4.19.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_AU, LC_CTYPE=en_AU (charmap=ISO-8859-1), LANGUAGE=en_GB:en_AU:en (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages apt depends on:
ii  adduser                 3.118
ii  debian-archive-keyring  2018.1
ii  gpgv                    2.2.12-1
ii  libapt-pkg5.0           1.8.0~alpha3
ii  libc6                   2.28-2
ii  libgcc1                 1:8.2.0-13
ii  libgnutls30             3.6.5-2
ii  libseccomp2             2.3.3-3
ii  libstdc++6              8.2.0-13

Versions of packages apt recommends:
ii  ca-certificates  20170717

Versions of packages apt suggests:
pn  apt-doc         <none>
ii  aptitude        0.8.11-6
ii  dpkg-dev        1.19.2
ii  gnupg           2.2.12-1
ii  gnupg2          2.2.12-1
ii  powermgmt-base  1.33

-- no debconf information
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Follow-Ups:
- Bug#920482: apt update fails to update from repository missing optional Contents files
  - From: Andrew Worsley <amworsley@gmail.com>
- Bug#920482: apt update fails to update from repository missing optional Contents files
  - From: Julian Andres Klode <jak@debian.org>
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