gnome-shell-extension-ubuntu-dock is installed in Ubuntu Full install in the repository mantic/main so you (relese team) should explain...
https://cdimages.ubuntu.com/daily-live/pending/mantic-desktop- amd64.manifest corrado@corrado-n4-mm-1005:~/Videos$ apt policy gnome-shell-extension-ubuntu-dock gnome-shell-extension-ubuntu-dock: Installed: 87ubuntu1 Candidate: 87ubuntu1 Version table: *** 87ubuntu1 500 500 http://archive.ubuntu.com/ubuntu mantic/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu mantic/main i386 Packages 100 /var/lib/dpkg/status corrado@corrado-n4-mm-1005:~/Videos$ apt show gnome-shell-extension-ubuntu-dock Package: gnome-shell-extension-ubuntu-dock Version: 87ubuntu1 Priority: optional Section: gnome Origin: Ubuntu Maintainer: Marco Trevisan <ma...@ubuntu.com> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 913 kB Depends: gnome-shell (<< 46~), gnome-shell (>= 45~), dconf-gsettings-backend | gsettings-backend Replaces: gnome-shell-extension-dashtodock Homepage: https://github.com/micheleg/dash-to-dock/blob/ubuntu-dock/README.md Task: ubuntu-desktop-minimal, ubuntu-desktop, edubuntu-desktop-gnome Download-Size: 117 kB APT-Manual-Installed: no APT-Sources: http://archive.ubuntu.com/ubuntu mantic/main amd64 Packages Description: Ubuntu Dock for GNOME Shell A dock for the Gnome Shell, default Ubuntu experience. . This extension is a modified version of Dash To Dock with different defaults. Dash To Dock can be installed to replace it and give more (but unsupported) configuration options. corrado@corrado-n4-mm-1005:~/Videos$ -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/2034664 Title: Meta.Rectangle is deprecated, use Mtk.Rectangle instead Status in gnome-shell-extension-tiling-assistant package in Ubuntu: Fix Released Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: Fix Committed Bug description: [ Impact ] The gnome-shell 45.rc log fills with: Meta.Rectangle is deprecated, use Mtk.Rectangle instead [ Test case ] Run ubuntu with ubuntu extensions enabled (only). journalctl /usr/bin/gnome-shell should not contain any reference to Meta.Rectangle deprecation [ Regression potential ] Introspected types are not defined and so extensions my try to use undefined code. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-tiling-assistant/+bug/2034664/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp