[Bug 1990586] Re: 22.04: python3* mismatched phasing breaks dist-upgrades

[Steve Langasek]

python3{.10,-defaults,-stdlib-extensions} have all had their phasing set
to 100% now to avoid this issue.

** Changed in: python3-defaults (Ubuntu)
       Status: Triaged => Fix Released

** Changed in: python3-stdlib-extensions (Ubuntu)
       Status: Triaged => Fix Committed

** Changed in: python3-stdlib-extensions (Ubuntu)
       Status: Fix Committed => Fix Released

** Changed in: python3.10 (Ubuntu)
       Status: Triaged => Fix Released

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Title:
  22.04: python3* mismatched phasing breaks dist-upgrades

Status in apt package in Ubuntu:
  Incomplete
Status in python3-defaults package in Ubuntu:
  Fix Released
Status in python3-stdlib-extensions package in Ubuntu:
  Fix Released
Status in python3.10 package in Ubuntu:
  Fix Released

Bug description:
  Impact
  ------
  Users who manually run sudo apt dist-upgrade without paying attention can remove essential parts of their system

  Test Case
  ---------
  This test case won't work as well if phasing is set to 0% or 100%

  Create /etc/apt/apt.conf.d/phasing and set its contents to
  APT::Machine-ID 2c030cfce3b4487f9810f12a3ac6e87c;

  Then run

  sudo apt update
  sudo apt dist-upgrade

  Workaround In Advance
  ---------------------
  Don't run sudo apt dist-upgrade. Just run sudo apt upgrade
  Or use Update Manager or the Ubuntu Store to apply updates

  Workaround Afterwards
  ---------------------
  Fortunately, apt phasing is ignored for new package installs. So to get your Ubuntu Desktop back, just run

  sudo apt install ubuntu-desktop

  Other Info
  ----------
  These 3 updates were published today:
  python3-stdlib-extensions
  python3-defaults
  python3.10

  Suggested Fix
  -------------
  Fully phase those 3 source packages to 100%

  Apt Output
  ----------
  The following packages were automatically installed and are no longer required:
    apg apport-symptoms aptdaemon-data avahi-utils cups-pk-helper distro-info gdb gedit-common genisoimage gir1.2-dbusmenu-glib-0.4 gir1.2-dee-1.0 gir1.2-goa-1.0 gir1.2-gst-plugins-base-1.0
    gir1.2-gtksource-4 gir1.2-gudev-1.0 gir1.2-notify-0.7 gir1.2-packagekitglib-1.0 gir1.2-rb-3.0 gir1.2-secret-1 gir1.2-snapd-1 gir1.2-totem-1.0 gir1.2-totemplparser-1.0 gir1.2-udisks-2.0
    gir1.2-unity-7.0 gir1.2-vte-2.91 gir1.2-wnck-3.0 gnome-control-center-faces gnome-software-common gnome-terminal-data hplip-data ibus-data ibus-gtk4 libbabeltrace1 libboost-regex1.74.0
    libc6-dbg libcolord-gtk1 libdebuginfod-common libdebuginfod1 libdmapsharing-3.0-2 libglu1-mesa libgpod-common libgpod4 libgsound0 libgssdp-1.2-0 libgupnp-1.2-1 libgupnp-av-1.0-3
    libgupnp-dlna-2.0-4 libhpmud0 libimagequant0 libipt2 liblirc-client0 libmalcontent-0-0 libnetplan0 libraqm0 librsync2 librygel-core-2.6-2 librygel-db-2.6-2 librygel-renderer-2.6-2
    librygel-server-2.6-2 libsane-hpaio libsgutils2-2 libsource-highlight-common libsource-highlight4v5 libwhoopsie-preferences0 libwnck-3-0 libwnck-3-common libxatracker2 libxres1 libxss1
    libxvmc1 mobile-broadband-provider-info network-manager-gnome patch printer-driver-hpcups printer-driver-postscript-hp python-apt-common python3-blinker python3-certifi python3-cffi-backend
    python3-chardet python3-click python3-colorama python3-cryptography python3-dateutil python3-debconf python3-debian python3-defer python3-distro-info python3-fasteners python3-future
    python3-httplib2 python3-idna python3-importlib-metadata python3-jeepney python3-jwt python3-keyring python3-launchpadlib python3-lazr.restfulclient python3-lazr.uri python3-lockfile
    python3-louis python3-monotonic python3-more-itertools python3-oauthlib python3-olefile python3-pexpect python3-pkg-resources python3-problem-report python3-ptyprocess python3-pyparsing
    python3-requests python3-rfc3339 python3-secretstorage python3-six python3-tz python3-urllib3 python3-wadllib python3-xkit python3-zipp rygel whoopsie-preferences x11-apps x11-session-utils
    xbitmaps xbrlapi xcvt xfonts-scalable xinit xinput xserver-xorg-core xserver-xorg-input-all xserver-xorg-input-libinput xserver-xorg-input-wacom xserver-xorg-video-all
    xserver-xorg-video-amdgpu xserver-xorg-video-ati xserver-xorg-video-fbdev xserver-xorg-video-intel xserver-xorg-video-nouveau xserver-xorg-video-qxl xserver-xorg-video-radeon
    xserver-xorg-video-vesa xserver-xorg-video-vmware
  Use 'sudo apt autoremove' to remove them.
  The following packages will be REMOVED:
    apport apport-gtk aptdaemon apturl apturl-common command-not-found deja-dup duplicity gedit gnome-control-center gnome-online-accounts gnome-software gnome-software-plugin-snap gnome-terminal
    hplip ibus ibus-table language-selector-common language-selector-gnome nautilus-extension-gnome-terminal nautilus-share netplan.io networkd-dispatcher orca python3-apport python3-apt
    python3-aptdaemon python3-aptdaemon.gtk3widgets python3-bcrypt python3-brlapi python3-cairo python3-commandnotfound python3-cups python3-cupshelpers python3-dbus python3-distupgrade
    python3-gi python3-gi-cairo python3-ibus-1.0 python3-macaroonbakery python3-mako python3-markupsafe python3-nacl python3-netifaces python3-paramiko python3-pil python3-protobuf
    python3-pyatspi python3-pymacaroons python3-renderpm python3-reportlab python3-reportlab-accel python3-software-properties python3-systemd python3-uno python3-update-manager python3-yaml
    rhythmbox-plugin-alternative-toolbar rhythmbox-plugins software-properties-common software-properties-gtk system-config-printer system-config-printer-common system-config-printer-udev
    totem-plugins ubuntu-advantage-desktop-daemon ubuntu-advantage-tools ubuntu-desktop ubuntu-desktop-minimal ubuntu-drivers-common ubuntu-minimal ubuntu-release-upgrader-core
    ubuntu-release-upgrader-gtk ubuntu-session unattended-upgrades update-manager update-manager-core update-notifier update-notifier-common usb-creator-common usb-creator-gtk xorg xserver-xorg
  The following NEW packages will be installed:
    gnome-session
  The following packages have been kept back:
    grub-efi-amd64-bin grub-efi-amd64-signed gzip libnss-systemd libpam-systemd libpython3-stdlib libpython3.10 libpython3.10-minimal libpython3.10-stdlib libspeechd2 libsystemd0 libudev1 python3
    python3-gdbm python3-lib2to3 python3-minimal python3-speechd python3.10 python3.10-minimal speech-dispatcher speech-dispatcher-audio-plugins speech-dispatcher-espeak-ng systemd systemd-oomd
    systemd-sysv systemd-timesyncd udev xwayland
  0 upgraded, 1 newly installed, 83 to remove and 28 not upgraded.

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