Public bug reported:
On Ubuntu 26.04 with KDE Plasma 6.6.4 (Wayland), drkonqi-coredump-launcher
segfaults in libQt6Core.so.6.10.2 every time it is invoked to process a crash
of a snap-confined process that did NOT write a kcrash-metadata file
(e.g., the snap version of Spotify).
Because the user-systemd socket drkonqi-coredump-launcher.socket re-triggers
the service for every new coredump processed by systemd-coredump, including
coredumps that drkonqi itself just generated, this creates an infinite
respawn loop. The loop also blocks system shutdown: ksmserver-logout never
manages to drain the user's session slice, so logind never reaches
poweroff.target. My system stayed in graphical.target for over 4 hours after
I pressed "Shut Down".
In that time, 863 coredumps from drkonqi-coredump-launcher accumulated in
/var/lib/systemd/coredump/, consuming 1.8 GB of disk.
Btw, the triggering process was Spotify snap, rev 94
(1.2.86.502.g8cd7fb22)
Steps to reproduce:
1. Log in to a Plasma 6.6.4 Wayland session.
2. Start the spotify snap.
3. Choose "Shut Down" from the Plasma logout menu.
4. During the logout sequence, spotify aborts (SIGABRT).
5. Observe that drkonqi-coredump-launcher is invoked to process spotify's
crash, segfaults itself, and the user-systemd socket immediately
re-launches it to process its own coredump — repeat indefinitely.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: drkonqi 6.6.4-0ubuntu1
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu May 21 00:21:57 2026
InstallationDate: Installed on 2026-02-23 (87 days ago)
InstallationMedia: Kubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
SourcePackage: drkonqi
UpgradeStatus: Upgraded to resolute on 2026-04-27 (23 days ago)
** Affects: drkonqi (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug drkonqi kcrash plasma-6 regression resolute shutdown
snap wayland-session
** Attachment added: "Core dump to make gbd backtrace"
https://bugs.launchpad.net/bugs/2153529/+attachment/5972172/+files/coredump-drkonqi-incidente.zst
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https://bugs.launchpad.net/bugs/2153529
Title:
drkonqi-coredump-launcher segfaults in libQt6Core when KCrash metadata
is missing, causing an infinite respawn loop that prevents shutdown
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