Public bug reported:
Running any of the following commands:
apt full-upgrade
apt dist-upgrade
apt-get full-upgrade
apt-get dist-upgrade
crashes with the following assertion failure:
apt-get: ./apt-pkg/solver3.cc:65: bool
APT::Solver::CompareProviders3::operator()(APT::Solver::Var,
APT::Solver::Var): Assertion `not va.end() && not vb.end()' failed.
This is apt 3.1.6ubuntu2 arm64 on Ubuntu 25.10.
I have the following repositories enabled in sources.list.d:
fex-emu-ubuntu-fex-questing
mozillateam-ubuntu-ppa-questing
nvidia-container-toolkit
steam-stable
tomtomtom-ubuntu-yt-dlp-questing
ubuntu
Types: deb
URIs: https://ppa.launchpadcontent.net/fex-emu/fex/ubuntu/
Suites: questing
Components: main
Types: deb
URIs: https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/
Suites: questing
Components: main
deb https://nvidia.github.io/libnvidia-container/stable/deb/$(ARCH)
/
deb [arch=amd64,i386] https://repo.steampowered.com/steam/ stable steam
deb-src [arch=amd64,i386] https://repo.steampowered.com/steam/ stable steam
Types: deb
URIs: https://ppa.launchpadcontent.net/tomtomtom/yt-dlp/ubuntu/
Suites: questing
Components: main
Types: deb
URIs: http://ports.ubuntu.com/ubuntu-ports/
Suites: questing questing-updates questing-backports questing-security
Components: main restricted universe multiverse
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: apt 3.1.6ubuntu2
ProcVersionSignature: Ubuntu 6.17.0-6.6-generic 6.17.1
Uname: Linux 6.17.0-6-generic aarch64
ApportVersion: 2.33.1-0ubuntu3
Architecture: arm64
CasperMD5CheckResult: pass
CurrentDesktop: sway
Date: Tue Nov 25 11:13:37 2025
InstallationDate: Installed on 2025-11-20 (5 days ago)
InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release arm64 (20251007)
ProcEnviron:
LANG=en_GB.UTF-8
PATH=(custom, no user)
SHELL=/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: apt (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 questing wayland-session
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https://bugs.launchpad.net/bugs/2132394
Title:
apt full-upgrade aborts on assertion failure
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