Bug 372751

Application: plasmashell (5.8.3)

Qt Version: 5.7.0
Frameworks Version: 5.28.0
Operating System: Linux 4.8.9-1-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Diconnected the laptop from a screen.
- Unusual behavior I noticed:

Every time the laptop is disconnected from a screen that's connected via HDMI, either a crash occurs or the panel disappears until a reboot or the displays are reconnected and then disabled.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc927f30800 (LWP 821))]

Thread 10 (Thread 0x7fc8505dd700 (LWP 1319)):
#0  0x00007fc91c8ff7c9 in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007fc91c901d43 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c9026ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fc852b090a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#8  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fc8669cc700 (LWP 1309)):
#0  0x00007fc921f5bba0 in  () at /usr/lib/libQt5Core.so.5
#1  0x00007fc91c901c89 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c9026ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fc8671cd700 (LWP 1308)):
#0  0x00007fc921d24f49 in QMutex::lock() () at /usr/lib/libQt5Core.so.5
#1  0x00007fc921f5c009 in  () at /usr/lib/libQt5Core.so.5
#2  0x00007fc91c902179 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc91c902724 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fc8677cb395 in  () at /usr/lib/qt/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#9  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fc86f777700 (LWP 1111)):
#0  0x00007fc92163a48d in poll () at /usr/lib/libc.so.6
#1  0x00007fc91c902786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fc925c28856 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fc8fdbd0700 (LWP 1109)):
#0  0x00007fc920e4310f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fc9276c4ac4 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fc9276c4b09 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fc8ffbb5700 (LWP 1105)):
#0  0x00007fc91c90213c in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#1  0x00007fc91c902724 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fc92508c2d5 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fc905649700 (LWP 1102)):
#0  0x00007fc91c8ff77f in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007fc91c9020b4 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c902724 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fc92508c2d5 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fc907090700 (LWP 961)):
#0  0x00007fc92163a48d in poll () at /usr/lib/libc.so.6
#1  0x00007fc91c902786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fc921f5c72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fc921d290f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fc922aa9e55 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fc911572700 (LWP 863)):
#0  0x00007fc92163a48d in poll () at /usr/lib/libc.so.6
#1  0x00007fc9265f98e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fc9265fb679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fc9132af449 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fc921d2dd78 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fc920e3d454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fc9216437df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fc927f30800 (LWP 821)):
[KCrash Handler]
#6  0x00007fc9235b06fb in  () at /usr/lib/libKF5ConfigCore.so.5
#7  0x00007fc9235ad779 in KConfigGroup::readEntry(char const*, QVariant const&) const () at /usr/lib/libKF5ConfigCore.so.5
#8  0x0000000000432fc0 in  ()
#9  0x00007fc921f339ce in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#10 0x00007fc9227b3f92 in QScreen::geometryChanged(QRect const&) () at /usr/lib/libQt5Gui.so.5
#11 0x00007fc922457181 in QGuiApplicationPrivate::reportGeometryChange(QWindowSystemInterfacePrivate::ScreenGeometryEvent*) () at /usr/lib/libQt5Gui.so.5
#12 0x00007fc922457f3d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#13 0x00007fc922435cab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#14 0x00007fc9132e52f0 in  () at /usr/lib/libQt5XcbQpa.so.5
#15 0x00007fc91c902587 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#16 0x00007fc91c9027f0 in  () at /usr/lib/libglib-2.0.so.0
#17 0x00007fc91c90289c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#18 0x00007fc921f5c70f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fc921f0623a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007fc921f0e73c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#21 0x000000000041c8b2 in  ()
#22 0x00007fc92157b291 in __libc_start_main () at /usr/lib/libc.so.6
#23 0x000000000041cc3a in _start ()

Reported using DrKonqi