(gdb) bt full #0 0x00007f16ea95c05d in nanosleep () from /lib64/libc.so.6 No symbol table info available. #1 0x00007f16ea95bef7 in sleep () from /lib64/libc.so.6 No symbol table info available. #2 0x00007f16ea4458a9 in ?? () from /usr/lib64/libKF5Crash.so.5 No symbol table info available. #3 0x00007f16ea44593a in ?? () from /usr/lib64/libKF5Crash.so.5 No symbol table info available. #4 0x00007f16ea445f8a in KCrash::defaultCrashHandler(int) () from /usr/lib64/libKF5Crash.so.5 No symbol table info available. #5 No symbol table info available. #6 0x00007f16e7ba1a5b in QObject::disconnect (sender=0x5634b69e6a90, signal=signal@entry=0x0, receiver=receiver@entry=0x5634b6f78d50, method=method@entry=0x0) at kernel/qobject.cpp:2937 signal_arg = 0x0 signal_name = {d = 0x5634b5467120 } signal_found = false method_name = {d = 0x5634b5467120 } method_arg = 0x0 membcode = method_found = false res = false smeta = 0x7f16e972416e signalName = {d = 0x7ffe699549a0} signalTypes = {a = 11, s = 0, ptr = 0x7ffe69954a70, { array = "\020K\225i\376\177\000\000\360\006\245\266\064V\000\000PJ\225i\376\177\000\000\226\276\272\347\026\177\000\000PJ\225i\376\177\000\000\000\351s\037\032\361#\251pW\225i\376\177\000\000\200\242\355\266\064V\000\000`\325\357\266\064V\000\000pW\225i\376\177\000\000\220J\225i\376\177\000\000\375D\344\351\026\177\000\000\001\000\000\000\000\000\000\000pW\225i\376\177\000\000\000\000\000\000\000\000\000\000hJ\225i\376\177\000\000\360J\225i\376\177\000\000\000\351s\037\032\361#\251\300J\225i\376\177\000\000\235\205\326\351\026\177\000", q_for_alignment_1 = 140730669812496, q_for_alignment_2 = 6.9530189270582055e-310}} methodName = {d = 0x7ffe699549c0} methodTypes = {a = 1771391344, s = 32766, ptr = 0xa923f11a1f73e900, { array = "pW\225i\376\177\000\001P\333\354\266\016\000\000\000`\325\357\266\064V\000\000\000\351s\037\032\361#\251\260I\225i\376\177\000\000\260T\365\266\064V\000\000\v\000\000\000\000\000\000\000\000J\225i\376\177\000\000\240J\225i\376\177\000\000\360\006\245\266\064V\000\000\340I\225i\376\177\000\000\226\276\272\347\026\177\000\000\340I\225i\376\177\000\000\000\351s\037\032\361#\251pW\225i\376\177\000\000\300\327\354\266\064V\000\000\260T\365\266\064V\000\000\000\351s\037\032\361#\251 J\225i\376\177\000\000`\325\357\266\064V\000", q_for_alignment_1 = 72198324707743600, q_for_alignment_2 = 7.5189585437633696e-304}} #7 0x00007f16e9e069ab in disconnect () at /usr/include/qt5/QtCore/qobject.h:361 member = 0x0 receiver = 0x5634b6f78d50 this = #8 QQuickScreenAttached::screenChanged(QScreen*) (this=this@entry=0x5634b6f78d50, screen=0x5634b69e1300) at items/qquickscreen.cpp:342 oldScreen = #9 0x00007f16e9e06bf2 in QQuickScreenAttached::windowChanged(QQuickWindow*) (this=0x5634b6f78d50, c=0x7ffe69955770) at items/qquickscreen.cpp:329 No locals. #10 0x00007f16e9e518b7 in QQuickItemPrivate::refWindow(QQuickWindow*) (this=0x5634b6ed9d60, c=c@entry=0x7ffe69955770) at items/qquickitem.cpp:2792 q = 0x5634b6eb7910 #11 0x00007f16e9e51870 in QQuickItemPrivate::refWindow(QQuickWindow*) (this=this@entry=0x5634b6e81460, c=c@entry=0x7ffe69955770) at items/qquickitem.cpp:2786 child = ii = 1 q = 0x5634b6e81430 #12 0x00007f16e9e52e21 in QQuickItem::setParentItem(QQuickItem*) (this=this@entry=0x5634b6e81430, parentItem=0x5634b6a506f0) at items/qquickitem.cpp:2530 oldParentItem = 0x0 scopeFocusedItem = 0x0 parentWindow = 0x7ffe69955770 #13 0x00007f16ea66b264 in PlasmaQuick::Dialog::setMainItem(QQuickItem*) (this=0x7ffe69955770, mainItem=0x5634b6e81430) at /var/tmp/portage/kde-frameworks/plasma-5.14.0/work/plasma-framework-5.14.0/src/plasmaquick/dialog.cpp:715 layout = #14 0x00007f16e7bab99e in call () at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124 a = r = 0x7ffe69955770 #15 QMetaObject::activate (sender=sender@entry=0x5634b6b6dde0, signalOffset=, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3703 obj = {d = 0x5634b6ddc0c0} receiverInSameThread = sw = {receiver = 0x7ffe69955770, previousSender = 0x0, currentSender = {sender = 0x5634b6b6dde0, signal = 3, ref = 1}, switched = true} callFunction = receiver = 0x7ffe69955770 method_relative = 65535 c = 0x5634b6dd1c40 last = 0x5634b6dd1c40 locker = {val = 139736356849592} connectionLists = {connectionLists = 0x5634b6dce220} list = 0x5634b6dce298 signal_index = 3 empty_argv = {0x0} currentThreadId = 0x7f16da7f8840 #16 0x00007f16e7babe96 in QMetaObject::activate (sender=0x5634b6b6dde0, m=, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3583 No locals. #17 0x00007f16ea019279 in ?? () from /usr/lib64/libKF5Declarative.so.5 No symbol table info available. #18 0x00007f16e7ceb123 in QMetaCallEvent::placeMetaCall(QObject*) (this=0x5634b708fe00, object=0x5634b6b6dde0) at kernel/qobject.cpp:486 No locals. #19 0x00007f16e7cefa28 in QObject::event(QEvent*) (this=0x5634b6b6dde0, e=) at kernel/qobject.cpp:1246 mce = sw = {receiver = 0x5634b6b6dde0, previousSender = 0x0, currentSender = {sender = 0x0, signal = -1, ref = 1}, switched = true} #20 0x00007f16e8b4288c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5 No symbol table info available. #21 0x00007f16e8b4300a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5 No symbol table info available. ---Type to continue, or q to quit--- #22 0x00007f16e7b2d6a5 in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe69955700, receiver=receiver@entry=0x5634b6b6dde0, event=event@entry=0x5634b708fe00) at kernel/qcoreapplication.cpp:965 result = false cbdata = {0x5634b6b6dde0, 0x5634b708fe00, 0x7ffe6995522f} d = threadData = 0x5634b69c3f10 #23 0x00007f16e7b2dbf5 in sendEvent () at kernel/qcoreapplication.h:224 No locals. #24 QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x5634b69c3f10) at kernel/qcoreapplication.cpp:1593 e = 0x5634b708fe00 pe = r = 0x5634b6b6dde0 locker = {val = 94784401981240} startOffset = 0 i = @0x5634b69c3f2c: 60 cleanup = {receiver = 0x0, event_type = 0, data = 0x5634b69c3f10, exceptionCaught = true} #25 0x00007f16e7b2ddbb in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451 data = #26 0x00007f16e7b5a35f in postEventSourceDispatch (s=0x5634b6a18670) at kernel/qeventdispatcher_glib.cpp:271 source = 0x5634b6a18670 #27 0x00007f16e58afeda in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 No symbol table info available. #28 0x00007f16e58cbbb8 in ?? () from /usr/lib64/libglib-2.0.so.0 No symbol table info available. #29 0x00007f16e58b1141 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0 No symbol table info available. #30 0x00007f16e7b527a1 in QEventDispatcherGlib::processEvents (this=0x5634b6a09bf0, flags=...) at kernel/qeventdispatcher_glib.cpp:418 d = 0x5634b6a0e7d0 canWait = true savedFlags = result = #31 0x00007f16da4a6c1c in QPAEventDispatcherGlib::processEvents (this=, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:115 No locals. #32 0x00007f16e7b26557 in QEventLoop::processEvents(QFlags) (this=this@entry=0x7ffe69955610, flags=..., flags@entry=...) at kernel/qeventloop.cpp:128 d = #33 0x00007f16e7b2e006 in QEventLoop::exec(QFlags) (this=this@entry=0x7ffe69955610, flags=flags@entry=...) at kernel/qeventloop.cpp:204 d = 0x5634b6e7b200 locker = {val = 94784401981472} ref = {d = 0x5634b6e7b200, locker = @0x7ffe69955570, exceptionCaught = true} #34 0x00007f16e7b2edc4 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229 threadData = 0x5634b69c3f10 eventLoop = {} returnCode = #35 0x00007f16e7f776bc in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1528 No locals. #36 0x00005634b525fd7f in main () No symbol table info available. (gdb) frame 6 #6 0x00007f16e7ba1a5b in QObject::disconnect (sender=0x5634b69e6a90, signal=signal@entry=0x0, receiver=receiver@entry=0x5634b6f78d50, method=method@entry=0x0) at kernel/qobject.cpp:2937 2937 kernel/qobject.cpp: No such file or directory. (gdb) p *sender $10 = {_vptr.QObject = 0x0, d_ptr = {d = 0x180000005c}} (gdb)