Bug 362227

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-21-generic x86_64
Distribution: Ubuntu 16.04 LTS

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

Im running notebook Acer aspirce v3-772g with closed lid, attached 2 external monitors. Locking screen. After unlock with password plasma crashes, also kwin not running, aslo desktop settings reset. Panels and widgets moving from one screen to another.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0d9dfc28c0 (LWP 1522))]

Thread 8 (Thread 0x7f0d891b2700 (LWP 1525)):
#0  0x00007f0d986d3e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0d9c798c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f0d9c79a8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f0d8b300629 in QXcbEventReader::run (this=0x805a10) at qxcbconnection.cpp:1253
#4  0x00007f0d98dc984e in QThreadPrivate::start (arg=0x805a10) at thread/qthread_unix.cpp:331
#5  0x00007f0d97eb66fa in start_thread (arg=0x7f0d891b2700) at pthread_create.c:333
#6  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f0d828fe700 (LWP 1607)):
#0  0x00007f0d986d3e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0d9546931c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d99000a9b in QEventDispatcherGlib::processEvents (this=0x7f0d7c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7f0d828fdce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f0d98dc48a4 in QThread::exec (this=this@entry=0x8cfa30) at thread/qthread.cpp:503
#6  0x00007f0d9b66c3c5 in QQmlThreadPrivate::run (this=0x8cfa30) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f0d98dc984e in QThreadPrivate::start (arg=0x8cfa30) at thread/qthread_unix.cpp:331
#8  0x00007f0d97eb66fa in start_thread (arg=0x7f0d828fe700) at pthread_create.c:333
#9  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f0d7736d700 (LWP 1644)):
#0  0x00007f0d986d3e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0d9546931c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d99000a9b in QEventDispatcherGlib::processEvents (this=0x7f0d700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7f0d7736cce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f0d98dc48a4 in QThread::exec (this=this@entry=0xc11950) at thread/qthread.cpp:503
#6  0x00007f0d9b66c3c5 in QQmlThreadPrivate::run (this=0xc11950) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f0d98dc984e in QThreadPrivate::start (arg=0xc11950) at thread/qthread_unix.cpp:331
#8  0x00007f0d97eb66fa in start_thread (arg=0x7f0d7736d700) at pthread_create.c:333
#9  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f0d754b2700 (LWP 1650)):
#0  0x00007f0d954ada64 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0d95468cda in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d954692c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0d99000a9b in QEventDispatcherGlib::processEvents (this=0x7f0d680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7f0d754b1ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f0d98dc48a4 in QThread::exec (this=this@entry=0xd17400) at thread/qthread.cpp:503
#7  0x00007f0d9b66c3c5 in QQmlThreadPrivate::run (this=0xd17400) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f0d98dc984e in QThreadPrivate::start (arg=0xd17400) at thread/qthread_unix.cpp:331
#9  0x00007f0d97eb66fa in start_thread (arg=0x7f0d754b2700) at pthread_create.c:333
#10 0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f0d6f9c4700 (LWP 1665)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0d9da11bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f0d9da11c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f0d97eb66fa in start_thread (arg=0x7f0d6f9c4700) at pthread_create.c:333
#4  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f0ce730d700 (LWP 1692)):
#0  0x00007f0d986d3e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0d9546931c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d99000a9b in QEventDispatcherGlib::processEvents (this=0x7f0ce00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7f0ce730cc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f0d98dc48a4 in QThread::exec (this=this@entry=0x14fd780) at thread/qthread.cpp:503
#6  0x00007f0d9bff2ed6 in QQuickPixmapReader::run (this=0x14fd780) at util/qquickpixmapcache.cpp:817
#7  0x00007f0d98dc984e in QThreadPrivate::start (arg=0x14fd780) at thread/qthread_unix.cpp:331
#8  0x00007f0d97eb66fa in start_thread (arg=0x7f0ce730d700) at pthread_create.c:333
#9  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f0cd500c700 (LWP 1971)):
#0  0x00007f0d986d3e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0d9546931c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d99000a9b in QEventDispatcherGlib::processEvents (this=0x7f0cd00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7f0cd500bcc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f0d98dc48a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f0cd74ec7d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f0d98dc984e in QThreadPrivate::start (arg=0xf14b80) at thread/qthread_unix.cpp:331
#8  0x00007f0d97eb66fa in start_thread (arg=0x7f0cd500c700) at pthread_create.c:333
#9  0x00007f0d986dfb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f0d9dfc28c0 (LWP 1522)):
[KCrash Handler]
#6  QV4::Managed::d (this=0x0) at jsruntime/qv4managed_p.h:134
#7  QV4::Managed::as<QV4::RegExpObject> (this=0x0) at jsruntime/qv4managed_p.h:182
#8  toVariant (e=0xd2e2c0, value=..., typeHint=typeHint@entry=39, createJSValueForObjects=createJSValueForObjects@entry=true, visitedObjects=visitedObjects@entry=0x0) at jsruntime/qv4engine.cpp:1281
#9  0x00007f0d9b536294 in QV4::ExecutionEngine::toVariant (this=<optimized out>, value=..., typeHint=typeHint@entry=39, createJSValueForObjects=createJSValueForObjects@entry=true) at jsruntime/qv4engine.cpp:1192
#10 0x00007f0d9b5eaa50 in QQmlPropertyPrivate::writeBinding (object=0xe705f0, core=..., context=0xed64a0, expression=expression@entry=0x31411b0, result=..., isUndefined=isUndefined@entry=false, flags=...) at qml/qqmlproperty.cpp:1548
#11 0x00007f0d9b6588cf in QQmlBinding::update (this=0x3141190, flags=...) at qml/qqmlbinding.cpp:198
#12 0x00007f0d9b658cfe in QQmlBinding::update (this=<optimized out>) at qml/qqmlbinding_p.h:97
#13 QQmlBinding::expressionChanged (e=<optimized out>) at qml/qqmlbinding.cpp:260
#14 0x00007f0d9b634bae in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7fff587b5280) at qml/qqmlnotifier.cpp:94
#15 0x00007f0d9b5d786c in QQmlData::signalEmitted (object=0xe09ce0, index=50, a=0x7fff587b5280) at qml/qqmlengine.cpp:768
#16 0x00007f0d98fd88a0 in QMetaObject::activate (sender=sender@entry=0xe09ce0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7fff587b5280) at kernel/qobject.cpp:3599
#17 0x00007f0d98fd97d7 in QMetaObject::activate (sender=sender@entry=0xe09ce0, m=m@entry=0x69e580 <PanelView::staticMetaObject>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7fff587b5280) at kernel/qobject.cpp:3578
#18 0x00000000004410b2 in PanelView::screenChangedProxy (this=this@entry=0xe09ce0, _t1=_t1@entry=0x36acd70) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/obj-x86_64-linux-gnu/shell/moc_panelview.cpp:449
#19 0x0000000000446314 in PanelView::<lambda(QScreen*)>::operator() (screen=0x36acd70, __closure=<synthetic pointer>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/panelview.cpp:727
#20 QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QScreen*>, void, PanelView::showEvent(QShowEvent*)::<lambda(QScreen*)> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:495
#21 QtPrivate::Functor<PanelView::showEvent(QShowEvent*)::<lambda(QScreen*)>, 1>::call<QtPrivate::List<QScreen*>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:552
#22 QtPrivate::QFunctorSlotObject<PanelView::showEvent(QShowEvent*)::<lambda(QScreen*)>, 1, QtPrivate::List<QScreen*>, 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/x86_64-linux-gnu/qt5/QtCore/qobject_impl.h:192
#23 0x00007f0d98fd8e4f in QtPrivate::QSlotObjectBase::call (a=0x7fff587b53e0, r=0xe09ce0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#24 QMetaObject::activate (sender=sender@entry=0xe09ce0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff587b53e0) at kernel/qobject.cpp:3698
#25 0x00007f0d98fd97d7 in QMetaObject::activate (sender=sender@entry=0xe09ce0, m=m@entry=0x7f0d9972d6c0 <QWindow::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff587b53e0) at kernel/qobject.cpp:3578
#26 0x00007f0d992f00bf in QWindow::screenChanged (this=this@entry=0xe09ce0, _t1=_t1@entry=0x36acd70) at .moc/moc_qwindow.cpp:631
#27 0x00007f0d992f0fd5 in QWindowPrivate::emitScreenChangedRecursion (this=this@entry=0x1968230, newScreen=newScreen@entry=0x36acd70) at kernel/qwindow.cpp:360
#28 0x00007f0d992f42b5 in QWindowPrivate::setTopLevelScreen (this=0x1968230, newScreen=0x36acd70, recreate=<optimized out>) at kernel/qwindow.cpp:384
#29 0x00007f0d992ee225 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x5099030) at kernel/qguiapplication.cpp:1623
#30 0x00007f0d992d1f38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#31 0x00007f0d8b331f10 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#32 0x00007f0d95469127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f0d95469380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f0d9546942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f0d99000a7f in QEventDispatcherGlib::processEvents (this=0x82b3a0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#36 0x00007f0d98fa7dea in QEventLoop::exec (this=this@entry=0x7fff587b5760, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#37 0x00007f0d98fafe8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#38 0x00007f0d992e3c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#39 0x00007f0d99aa9495 in QApplication::exec () at kernel/qapplication.cpp:2976
#40 0x0000000000432d4a in main (argc=2, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Reported using DrKonqi