Application: plasmashell (5.19.5)

Qt Version: 5.14.2
Frameworks Version: 5.74.0
Operating System: Linux 5.8.0-50-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.10

-- Information about the crash:
- What I was doing when the application crashed:

I left my computer for some time and screens went off, as expected per power saving setup. When I came back, I moved the mouse to awake the computer, found the lock screen as expected, input my password and once back to my desktop plasma widgets were not visible, other windows were and the "report crash" dialog appeared.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault

[KCrash Handler]
#4  QExplicitlySharedDataPointer<KConfigGroupPrivate>::operator bool (this=0x18) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qshareddata.h:176
#5  KConfigGroup::parent (this=0x7ffebbf87360) at ./src/core/kconfiggroup.cpp:545
#6  0x0000561ab703ff86 in ?? ()
#7  0x0000561ab70402d2 in ?? ()
#8  0x00007f71fb8f2320 in doActivate<false> (sender=0x561abbafa440, signal_index=43, argv=0x7ffebbf874d0, argv@entry=0x0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395
#9  0x00007f71fb8ec068 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f71fda0eee0 <PlasmaQuick::ContainmentView::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x0) at kernel/qobject.cpp:3930
#10 0x00007f71fd9ebdd7 in PlasmaQuick::ContainmentView::containmentChanged (this=<optimized out>) at ./obj-x86_64-linux-gnu/src/plasmaquick/KF5PlasmaQuick_autogen/include/moc_containmentview.cpp:267
#11 0x00007f71fd9ec4d1 in PlasmaQuick::ContainmentViewPrivate::setContainment (this=0x561abc6d5920, cont=0x561ab78394c0) at ./src/plasmaquick/containmentview.cpp:81
#12 0x0000561ab704a383 in ?? ()
#13 0x00007f71fb8f22e6 in QtPrivate::QSlotObjectBase::call (a=0x7ffebbf87770, r=0x561ab737b830, this=0x561ab74144d0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#14 doActivate<false> (sender=0x561ab737b8e8, signal_index=3, argv=argv@entry=0x7ffebbf87770) at kernel/qobject.cpp:3870
#15 0x00007f71fb8ec068 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f71fbb48300 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffebbf87770) at kernel/qobject.cpp:3930
#16 0x00007f71fb8f5e2e in QTimer::timeout (this=<optimized out>, _t1=...) at .moc/moc_qtimer.cpp:205
#17 0x00007f71fb8e858f in QObject::event (this=0x561ab737b8e8, e=0x7ffebbf878e0) at kernel/qobject.cpp:1316
#18 0x00007f71fc3c8013 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x561ab737b8e8, e=0x7ffebbf878e0) at kernel/qapplication.cpp:3685
#19 0x00007f71fb8bc1ca in QCoreApplication::notifyInternal2 (receiver=0x561ab737b8e8, event=0x7ffebbf878e0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#20 0x00007f71fb912b73 in QTimerInfoList::activateTimers (this=0x561ab7364b20) at kernel/qtimerinfo_unix.cpp:643
#21 0x00007f71fb9134b4 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:230
#23 0x00007f71f9d4962b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f71f9d498d8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f71f9d499a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f71fb913843 in QEventDispatcherGlib::processEvents (this=0x561ab7377530, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#27 0x00007f71fb8baa4b in QEventLoop::exec (this=this@entry=0x7ffebbf87b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#28 0x00007f71fb8c2fc6 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#29 0x0000561ab702a84b in ?? ()
#30 0x00007f71fb26ccb2 in __libc_start_main (main=0x561ab7029c90, argc=1, argv=0x7ffebbf87de8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffebbf87dd8) at ../csu/libc-start.c:314
#31 0x0000561ab702aa2e in _start ()
[Inferior 1 (process 2929) detached]

Possible duplicates by query: bug 436664, bug 436640, bug 436397, bug 436263, bug 436180.

Reported using DrKonqi