SUMMARY In Plasma Wayland session, when a file/image is dragged from system tray notifications applet, the entire shell crashes. STEPS TO REPRODUCE 1. Log into Plasma Wayland session and take a screenshot or download/move/copy a file. 2. Let the notification timer run-out and get stored in notifications applet in system tray. 3. Open the notifications applet and drag the screenshot/file from here -> Plasmashell crashes and gets replaced immediately. OBSERVED RESULT Plasmashell crashes when dragging a file from notifications applet and gets replaced immediately. EXPECTED RESULT Dragging a file from notification stored inside notification applet not resulting a crash. SOFTWARE/OS VERSIONS KDE Plasma Version: 5.27.4 KDE Frameworks Version: 5.105.0 Qt Version: 5.15.9 ADDITIONAL INFORMATION using NVIDIA GeForce GTX 1060 with the NVIDIA proprietary 525.89 driver. Here is the video showcasing this bug: https://www.youtube.com/watch?v=6SQyGM9K1p4
If something crashed, we need a backtrace of it so we can figure out what's going on. Can you please attach a backtrace of the crash using the coredumpctl command-line program, as detailed in https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl? Thanks!
Created attachment 159057 [details] GDB Log of reproduced bug in plasmashell
Created attachment 159058 [details] Journal log of plasmashell when the crash occured
Pasting the backtrace inline for searchability: #0 QDrag::dragCursor (this=0x5555579a4180, action=action@entry=Qt::MoveAction) at kernel/qdrag.cpp:349 #1 0x00007ffff5da7be2 in QBasicDrag::updateCursor (this=this@entry=0x5555556240c0, action=Qt::MoveAction) at kernel/qsimpledrag.cpp:307 #2 0x00007ffff6d45e78 in QtWaylandClient::QWaylandDrag::setResponse (this=this@entry=0x5555556240c0, response=...) at /usr/src/debug/qt5-qtwayland-5.15.9-1.fc38.x86_64/src/client/qwaylanddnd.cpp:123 #3 0x00007ffff6d4b05a in operator() (action=Qt::MoveAction, accepted=true, __closure=<optimized out>) at /usr/src/debug/qt5-qtwayland-5.15.9-1.fc38.x86_64/src/client/qwaylanddatadevice.cpp:140 #4 QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1>, QtPrivate::List<bool, Qt::DropAction>, void, QtWaylandClient::QWaylandDataDevice::startDrag(QMimeData*, Qt::DropActions, QtWaylandClient::QWaylandWindow*)::<lambda(bool, Qt::DropAction)> >::call (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:146 #5 QtPrivate::Functor<QtWaylandClient::QWaylandDataDevice::startDrag(QMimeData*, Qt::DropActions, QtWaylandClient::QWaylandWindow*)::<lambda(bool, Qt::DropAction)>, 2>::call<QtPrivate::List<bool, Qt::DropAction>, void> (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:256 #6 QtPrivate::QFunctorSlotObject<QtWaylandClient::QWaylandDataDevice::startDrag(QMimeData*, Qt::DropActions, QtWaylandClient::QWaylandWindow*)::<lambda(bool, Qt::DropAction)>, 2, QtPrivate::List<bool, Qt::DropAction>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:443 #7 0x00007ffff58e8651 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffc990, r=<optimized out>, this=0x5555577c7aa0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398 #8 doActivate<false> (sender=0x555555efcc70, signal_index=5, argv=0x7fffffffc990) at kernel/qobject.cpp:3923 #9 0x00007ffff58e34d7 in QMetaObject::activate (sender=<optimized out>, m=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fffffffc990) at kernel/qobject.cpp:3983 #10 0x00007ffff6d4f4c9 in QtWaylandClient::QWaylandDataSource::dndResponseUpdated (this=<optimized out>, _t1=<optimized out>, _t2=<optimized out>) at .moc/moc_qwaylanddatasource_p.cpp:184 #11 0x00007ffff6d4e0a9 in QtWayland::wl_data_source::handle_target (data=0x555555efcc80, object=<optimized out>, mime_type=0x7fff8000195c "text/uri-list") at /usr/src/debug/qt5-qtwayland-5.15.9-1.fc38.x86_64/src/client/qwayland-wayland.cpp:697 #12 0x00007ffff72aebe6 in ffi_call_unix64 () at ../src/x86/unix64.S:104 #13 0x00007ffff72ab4bf in ffi_call_int (cif=cif@entry=0x7fffffffcbc0, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=closure@entry=0x0) at ../src/x86/ffi64.c:673 #14 0x00007ffff72ae18e in ffi_call (cif=cif@entry=0x7fffffffcbc0, fn=<optimized out>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7fffffffcc90) at ../src/x86/ffi64.c:710 #15 0x00007ffff7dcef0e in wl_closure_invoke (closure=closure@entry=0x7fff80001880, target=<optimized out>, target@entry=0x555557866a90, opcode=opcode@entry=0, data=<optimized out>, flags=1) at ../src/connection.c:1025 #16 0x00007ffff7dcf793 in dispatch_event (display=display@entry=0x555555627520, queue=0x555555627610) at ../src/wayland-client.c:1631 #17 0x00007ffff7dcfa3c in dispatch_queue (queue=0x555555627610, display=0x555555627520) at ../src/wayland-client.c:1777 #18 wl_display_dispatch_queue_pending (display=0x555555627520, queue=0x555555627610) at ../src/wayland-client.c:2019 #19 0x00007ffff6d26b4d in QtWaylandClient::QWaylandDisplay::flushRequests (this=<optimized out>) at /usr/src/debug/qt5-qtwayland-5.15.9-1.fc38.x86_64/src/client/qwaylanddisplay.cpp:255 #20 0x00007ffff58e87d8 in doActivate<false> (sender=0x555555641480, signal_index=4, argv=0x7fffffffcee0) at kernel/qobject.cpp:3935 #21 0x00007ffff58e34d7 in QMetaObject::activate (sender=sender@entry=0x555555641480, m=m@entry=0x7ffff5b65aa0 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3983 #22 0x00007ffff58b07e7 in QAbstractEventDispatcher::awake (this=this@entry=0x555555641480) at .moc/moc_qabstracteventdispatcher.cpp:149 #23 0x00007ffff590694d in QEventDispatcherGlib::processEvents (this=0x555555641480, flags=...) at kernel/qeventdispatcher_glib.cpp:430 #24 0x00007ffff58b270b in QEventLoop::exec (this=this@entry=0x55555a17ab50, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69 #25 0x00007ffff5da6a38 in QBasicDrag::drag (this=0x5555556240c0, o=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121 #26 0x00007ffff5da4e6d in QDragManager::drag (this=0x555557e013a0, o=o@entry=0x5555579a4180) at kernel/qdnd.cpp:117 #27 0x00007ffff5da5203 in QDrag::exec (this=0x5555579a4180, supportedActions=..., defaultDropAction=defaultDropAction@entry=Qt::IgnoreAction) at kernel/qdrag.cpp:283 #28 0x00007ffff5da529b in QDrag::exec (this=<optimized out>, supportedActions=...) at kernel/qdrag.cpp:238 #29 0x00007fffd0df3c40 in DragHelper::doDrag (pixmap=..., url=..., item=<optimized out>, this=0x555559eb0db0) at /usr/include/qt5/QtCore/qflags.h:121 #30 DragHelper::qt_static_metacall (_o=0x555559eb0db0, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/plasma-workspace-5.27.4.1-2.fc38.x86_64/redhat-linux-build/applets/notifications/org.kde.plasma.notifications_autogen/EWIEGA46WW/moc_draghelper.cpp:119 #31 0x00007ffff58df73b in QObject::event (this=0x555559eb0db0, e=0x7fffd4002ce0) at kernel/qobject.cpp:1347 #32 0x00007ffff65aeb75 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x555559eb0db0, e=0x7fffd4002ce0) at kernel/qapplication.cpp:3640 #33 0x00007ffff58b3d48 in QCoreApplication::notifyInternal2 (receiver=0x555559eb0db0, event=0x7fffd4002ce0) at kernel/qcoreapplication.cpp:1064 #34 0x00007ffff58b3f62 in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1462 #35 0x00007ffff58b71f5 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x555555615b20) at kernel/qcoreapplication.cpp:1821 #36 0x00007ffff58b74ad in QCoreApplication::sendPostedEvents (receiver=<optimized out>, event_type=<optimized out>) at kernel/qcoreapplication.cpp:1680 #37 0x00007ffff5906e2f in postEventSourceDispatch (s=0x55555563cfc0) at kernel/qeventdispatcher_glib.cpp:277 #38 0x00007ffff458c39c in g_main_dispatch (context=0x7fffdc000ee0) at ../glib/gmain.c:3460 #39 g_main_context_dispatch (context=0x7fffdc000ee0) at ../glib/gmain.c:4200 #40 0x00007ffff45ea438 in g_main_context_iterate.isra.0 (context=0x7fffdc000ee0, block=1, dispatch=1, self=<optimized out>) at ../glib/gmain.c:4276 #41 0x00007ffff4589a23 in g_main_context_iteration (context=0x7fffdc000ee0, may_block=1) at ../glib/gmain.c:4343 #42 0x00007ffff5906919 in QEventDispatcherGlib::processEvents (this=0x555555641480, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #43 0x00007ffff58b270b in QEventLoop::exec (this=this@entry=0x7fffffffd5a0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69 #44 0x00007ffff58ba99b in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121 #45 0x00007ffff5d606bd in QGuiApplication::exec () at kernel/qguiapplication.cpp:1863 #46 0x00007ffff65aeae9 in QApplication::exec () at kernel/qapplication.cpp:2832 #47 0x000055555557f62a in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.27.4.1-2.fc38.x86_64/shell/main.cpp:235
*** This bug has been marked as a duplicate of bug 470925 ***