Bug 360591

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.4-301.fc23.x86_64 x86_64
Distribution: "Fedora release 23 (Twenty Three)"

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

I was trying to navigate between widgets and moved the mouse pointer over the task bar.

- Unusual behavior I noticed:

Crash Reporting Assistant problems:

1) two "help" buttons on the left hand bottom
2) font WAY TOO SMALL to be visible; 6pt?
3) after showing me a list of possible bugs, NONE of the "forward/proceed/next" buttons were NON-gray

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f272f969940 (LWP 3502))]

Thread 8 (Thread 0x7f270eee2700 (LWP 3523)):
#0  0x00007f2727319fdd in poll () at /usr/lib64/libc.so.6
#1  0x00007f272d7d4272 in _xcb_conn_wait () at /usr/lib64/libxcb.so.1
#2  0x00007f272d7d5ee7 in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f271180cda9 in QXcbEventReader::run() () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#6  0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 7 (Thread 0x7f2707bd8700 (LWP 3544)):
#0  0x00007f2727319fdd in poll () at /usr/lib64/libc.so.6
#1  0x00007f272283d16c in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f2728159ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2727f1d434 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f272c26b9b5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#8  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#9  0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 6 (Thread 0x7f26fe363700 (LWP 3577)):
#0  0x00007f2727319fdd in poll () at /usr/lib64/libc.so.6
#1  0x00007f272283d16c in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f2728159ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2727f1d434 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f272c26b9b5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#8  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#9  0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 5 (Thread 0x7f26f7fff700 (LWP 3600)):
#0  0x00007f2727319fdd in poll () at /usr/lib64/libc.so.6
#1  0x00007f272283d16c in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f2728159ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2727f1d434 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f272c26b9b5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#8  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#9  0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 4 (Thread 0x7f26f5fb6700 (LWP 3608)):
#0  0x00007f2726662b10 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib64/libpthread.so.0
#1  0x00007f272f0c4514 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /usr/lib64/libQt5Script.so.5
#2  0x00007f272f0c4559 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#4  0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 3 (Thread 0x7f266dd60700 (LWP 3610)):
#0  0x00007f2728159486 in postEventSourcePrepare(_GSource*, int*) () at /usr/lib64/libQt5Core.so.5
#1  0x00007f272283c70d in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f272283d09b in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f2728159ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f2727f1d434 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f272ce198d6 in QQuickPixmapReader::run() () at /usr/lib64/libQt5Quick.so.5
#8  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#9  0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#10 0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 2 (Thread 0x7f265ce15700 (LWP 5215)):
#0  0x00007f2727315bcd in read () at /usr/lib64/libc.so.6
#1  0x00007f2722880390 in g_wakeup_acknowledge () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f272283cc64 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f272283d110 in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f2728159ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f2727f1d434 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007f265ea5f547 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#9  0x00007f2727f223de in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f272665d60a in start_thread () at /usr/lib64/libpthread.so.0
#11 0x00007f2727325a4d in clone () at /usr/lib64/libc.so.6

Thread 1 (Thread 0x7f272f969940 (LWP 3502)):
[KCrash Handler]
#5  0x00007f272d539c90 in Plasma::Applet::actions() const () at /usr/lib64/libKF5Plasma.so.5
#6  0x0000559e56cfce99 in ShellCorona::addOutput(QSharedPointer<KScreen::Output> const&) ()
#7  0x0000559e56cfd01f in ShellCorona::outputEnabledChanged() ()
#8  0x00007f2728132127 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#9  0x00007f272e818177 in KScreen::Output::apply(QSharedPointer<KScreen::Output> const&) () at /usr/lib64/libKF5Screen.so.6
#10 0x00007f272e8049fe in KScreen::Config::apply(QSharedPointer<KScreen::Config> const&) () at /usr/lib64/libKF5Screen.so.6
#11 0x00007f272e80ac79 in KScreen::ConfigMonitor::Private::updateConfigs(QSharedPointer<KScreen::Config> const&) () at /usr/lib64/libKF5Screen.so.6
#12 0x00007f272e80cf69 in KScreen::ConfigMonitor::Private::edidReady(QDBusPendingCallWatcher*) () at /usr/lib64/libKF5Screen.so.6
#13 0x00007f2728132127 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#14 0x00007f2728ef981f in QDBusPendingCallWatcher::finished(QDBusPendingCallWatcher*) () at /usr/lib64/libQt5DBus.so.5
#15 0x00007f2728efaef5 in QDBusPendingCallWatcher::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib64/libQt5DBus.so.5
#16 0x00007f2728133161 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#17 0x00007f27296b741c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#18 0x00007f27296bc8e6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#19 0x00007f272810373b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#20 0x00007f2728105b36 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#21 0x00007f2728159aa3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f272283ce3a in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#23 0x00007f272283d1d0 in g_main_context_iterate.isra () at /usr/lib64/libglib-2.0.so.0
#24 0x00007f272283d27c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#25 0x00007f2728159eaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#26 0x00007f2728100eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#27 0x00007f2728108fac in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#28 0x0000559e56cd808a in main ()

Possible duplicates by query: bug 360346, bug 360282, bug 360220, bug 359820, bug 359300.

Reported using DrKonqi