Application: systemsettings (5.81.0) Qt Version: 6.6.0 Frameworks Version: 5.245.0 Operating System: Linux 6.5.7-060507-generic x86_64 Windowing System: Wayland Distribution: KDE neon Unstable Edition DrKonqi: 5.81.0 [CoredumpBackend] -- Information about the crash: open Font Management KCM, close System Settings; Plasma notifies a crash. Can also reproduce on Arch Linux running Plasma 6 alpha. The crash can be reproduced every time. -- Backtrace (Reduced): #7 0x00007f6686227b7e in QWidget::ensurePolished() const (this=0x55ab53fc5200) at ./src/widgets/kernel/qwidget.cpp:10230 #8 0x00007f668611e7af in QSplitter::sizes() const (this=<optimized out>) at ./src/widgets/widgets/qsplitter.cpp:1563 #9 0x00007f66642a025b in KFI::CKCmFontInst::~CKCmFontInst() (this=0x55ab5406e500, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt6/QtCore/qflags.h:74 #10 0x00007f66642a041d in KFI::CKCmFontInst::~CKCmFontInst() (this=0x55ab5406e500, __in_chrg=<optimized out>) at ./kcms/kfontinst/kcmfontinst/KCmFontInst.cpp:360 #11 0x00007f66841c7c0a in QObjectPrivate::deleteChildren() (this=this@entry=0x55ab540672b0) at ./src/corelib/kernel/qobject.cpp:2206 Reported using DrKonqi
Created attachment 163157 [details] New crash information added by DrKonqi DrKonqi auto-attaching complete backtrace.
Created attachment 163164 [details] dump debug symbols confirmed - also on arch Operating System: Arch Linux KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.245.0 Qt Version: 6.6.0 Kernel Version: 6.7.0-rc1-next-20231114-1-next-git-01346-g5ba73bec5e7b-dirty (64-bit) Graphics Platform: Wayland Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: AMD Radeon RX 6800 XT
Can also confirm.
Git commit cf04d02a42ff08f332d6ed55fa894c7e1c61b4cc by Harald Sitter. Committed on 25/11/2023 at 19:39. Pushed by sitter into branch 'master'. kfontinst: don't crash on exit lifetimes have changed in kf6: `widget()` is a child of `parent` and as such a sibling to `CKCmFontInst` what happens at destruction is that ~parent runs -> ~widget runs (destroys its children - among them the splitters) then ~CKCmFontInst runs -> crash. Instead simply hold on to the destroyed signal of widget which fires before its children (the splitters) get destroyed. It feels a bit hacky but in the grands scheme of things the widget code is not long for this world anyway. Fixes SYSTEMSETTINGS-3A M +8 -4 kcms/kfontinst/kcmfontinst/KCmFontInst.cpp https://invent.kde.org/plasma/plasma-workspace/-/commit/cf04d02a42ff08f332d6ed55fa894c7e1c61b4cc