SUMMARY Updated a 32-Bit system to plasma 5.19. Existing panel configuration causes plasmashell to crash immediately after login. Have to start with a new configuration (removed plasma-org.kde.plasma.desktop-appletsrc). As it seems, adding spacers to new configured panels also crashes plasma. STEPS TO REPRODUCE 1. Add empty panel to the desktop (for example at the right border) 2. Add a quick start widget 3. Add a spacer -> crash OBSERVED RESULT Plasmashell crashes with spacers in panels. Happens with panels configured before update to 5.19 as well as "new" panels (after plasma-org.kde.plasma.desktop-appletsrc is cleared/removed). EXPECTED RESULT Widgets and spacers in panels should be allowed and resizeable. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Void Linux, Kernel 5.4.46 i686 KDE Plasma Version: 5.19.0 KDE Frameworks Version: 5.70.0 Qt Version: 5.14.2 ADDITIONAL INFORMATION Updating a 64-Bit system with the same panel layout didn't crash plasma. but completely shattered the panel layout (filed another bug).
We can't do much without a backtrace.
Created attachment 129338 [details] backtrace of plasmashell while adding a spacer Hopefully the login crash is caused by the same reason: it would be difficult to attach a debugger within the login procedure ...
Chaged status
Relevant bits: #29 0xb7b7e0d9 in KDeclarative::QmlObject::completeInitialization(QHash<QString, QVariant> const&) () from target:/usr/lib32/libKF5Declarative.so.5 #30 0xb7f72ae9 in PlasmaQuick::AppletQuickItem::init() () from target:/usr/lib32/libKF5PlasmaQuick.so.5 #31 0xaf556847 in ?? () from target:/usr/lib/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so #32 0xb7f74719 in PlasmaQuick::AppletQuickItem::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () from target:/usr/lib32/libKF5PlasmaQuick.so.5 #33 0xb7829ae5 in QQuickItemPrivate::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () from target:/usr/lib32/libQt5Quick.so.5 #34 0xb782e55c in QQuickItemPrivate::refWindow(QQuickWindow*) () from target:/usr/lib32/libQt5Quick.so.5 #35 0xb7831208 in QQuickItem::setParentItem(QQuickItem*) () from target:/usr/lib32/libQt5Quick.so.5 #36 0xb78359d4 in ?? () from target:/usr/lib32/libQt5Quick.so.5 #37 0xb7835f98 in QQuickItem::qt_metacall(QMetaObject::Call, int, void**) () from target:/usr/lib32/libQt5Quick.so.5 #38 0xb7f747e2 in PlasmaQuick::AppletQuickItem::qt_metacall(QMetaObject::Call, int, void**) () from target:/usr/lib32/libKF5PlasmaQuick.so.5 #39 0xaf5579b2 in ?? () from target:/usr/lib/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so #40 0xb5ac826e in QMetaProperty::write(QObject*, QVariant const&) const () from target:/usr/lib32/libQt5Core.so.5 #41 0xb5af4f53 in QObject::setProperty(char const*, QVariant const&) () from target:/usr/lib32/libQt5Core.so.5 #42 0xaf55a86e in ?? () from target:/usr/lib/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so #43 0xb5af64b9 in ?? () from target:/usr/lib32/libQt5Core.so.5 #44 0xb7bbeb25 in Plasma::Containment::appletAdded(Plasma::Applet*) () from target:/usr/lib32/libKF5Plasma.so.5 #45 0xb7bc1083 in Plasma::Containment::addApplet(Plasma::Applet*) () from target:/usr/lib32/libKF5Plasma.so.5 #46 0xb7bd99b2 in ?? () from target:/usr/lib32/libKF5Plasma.so.5 #47 0xb7bbf4e5 in Plasma::Containment::createApplet(QString const&, QList<QVariant> const&) () from target:/usr/lib32/libKF5Plasma.so.5 Are you still seeing this in Plasma 5.20?
Yes, trying to add a spacer into a panel still segfaults with Plasma 5.20.4, see new attachment.
Created attachment 134187 [details] Crash with Plasma 5.20.4
Thanks for confirming.
Can confirm the same bug for x86-64-musl on void linux.
https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/769 fixes this bug.
Git commit 3691730899ec19da2dd939a1aad91c166f3c2944 by Nate Graham, on behalf of John Zimmermann. Committed on 05/04/2021 at 02:44. Pushed by ngraham into branch 'master'. Make sure that *m_twinSpacer is iniitialized in panelspacer This fixes a segfault of panelspacer on musl and 32bit glibc systems. M +1 -1 applets/panelspacer/plugin/panelspacer.h https://invent.kde.org/plasma/plasma-workspace/commit/3691730899ec19da2dd939a1aad91c166f3c2944
Git commit 1f244ed71f4992e6d18d255798a03c19dcbfb057 by Nate Graham, on behalf of John Zimmermann. Committed on 05/04/2021 at 02:49. Pushed by ngraham into branch 'Plasma/5.21'. Make sure that *m_twinSpacer is iniitialized in panelspacer This fixes a segfault of panelspacer on musl and 32bit glibc systems. (cherry picked from commit 3691730899ec19da2dd939a1aad91c166f3c2944) M +1 -1 applets/panelspacer/plugin/panelspacer.h https://invent.kde.org/plasma/plasma-workspace/commit/1f244ed71f4992e6d18d255798a03c19dcbfb057