Bug 358683

Application: plasmashell (5.5.3)

Qt Version: 5.5.1
Operating System: Linux 4.3.3-303.fc23.x86_64 x86_64
Distribution: "Fedora release 23 (Twenty Three)"

-- Information about the crash:
- What I was doing when the application crashed:
Booted my laptop with an external screen as the primary display
- Unusual behavior I noticed:
Start the control panel and switch off the laptop screen -> apply -> switch on the laptop screen -> apply causes the crash and after a restart everything is fine.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcb89a46940 (LWP 3350))]

Thread 7 (Thread 0x7fcb62fc4700 (LWP 3444)):
#0  0x00007fcb8995c429 in _dl_update_slotinfo () at /lib64/ld-linux-x86-64.so.2
#1  0x00007fcb8995c65c in update_get_addr () at /lib64/ld-linux-x86-64.so.2
#2  0x00007fcb8203c322 in QThreadData::current(bool) () at /lib64/libQt5Core.so.5
#3  0x00007fcb8227442a in postEventSourcePrepare(_GSource*, int*) () at /lib64/libQt5Core.so.5
#4  0x00007fcb7c95a70d in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#5  0x00007fcb7c95b09b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#6  0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#7  0x00007fcb82274ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#8  0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#9  0x00007fcb82038434 in QThread::exec() () at /lib64/libQt5Core.so.5
#10 0x00007fcb86383b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#11 0x00007fcb8203d3de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#12 0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#13 0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fcb5a157700 (LWP 3520)):
#0  0x00007fcb81434fdd in poll () at /lib64/libc.so.6
#1  0x00007fcb7c95b16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fcb82274ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fcb82038434 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fcb86383b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007fcb8203d3de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#9  0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fcb53fff700 (LWP 3558)):
#0  0x00007fcb7c99f734 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007fcb7c95a9e9 in g_main_context_query () at /lib64/libglib-2.0.so.0
#2  0x00007fcb7c95b0e7 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fcb82274ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fcb82038434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007fcb86383b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007fcb8203d3de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#10 0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fcb52bd5700 (LWP 3639)):
#0  0x00007fcb8077db10 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fcb891dc514 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007fcb891dc559 in  () at /lib64/libQt5Script.so.5
#3  0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#4  0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fcaca407700 (LWP 3847)):
#0  0x00007fcb7c99f719 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007fcb7c95a110 in g_main_context_acquire () at /lib64/libglib-2.0.so.0
#2  0x00007fcb7c95b025 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fcb82274ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fcb82038434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007fcb86f318d6 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#8  0x00007fcb8203d3de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#10 0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fcacbfff700 (LWP 4257)):
#0  0x00007fcb8144e5a2 in __libc_disable_asynccancel () at /lib64/libc.so.6
#1  0x00007fcb81434fe9 in poll () at /lib64/libc.so.6
#2  0x00007fcb7c95b16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fcb82274ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fcb82038434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007fcac11cb3c7 in KCupsConnection::run() () at /lib64/libkcupslib.so
#8  0x00007fcb8203d3de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007fcb8077860a in start_thread () at /lib64/libpthread.so.0
#10 0x00007fcb81440a4d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fcb89a46940 (LWP 3350)):
[KCrash Handler]
#5  0x00007fcb87651d10 in Plasma::Applet::actions() const () at /lib64/libKF5Plasma.so.5
#6  0x000055663995be99 in ShellCorona::addOutput(QSharedPointer<KScreen::Output> const&) ()
#7  0x000055663995c01f in ShellCorona::outputEnabledChanged() ()
#8  0x00007fcb8224d127 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#9  0x00007fcb88930177 in KScreen::Output::apply(QSharedPointer<KScreen::Output> const&) () at /lib64/libKF5Screen.so.6
#10 0x00007fcb8891c9fe in KScreen::Config::apply(QSharedPointer<KScreen::Config> const&) () at /lib64/libKF5Screen.so.6
#11 0x00007fcb88922c79 in KScreen::ConfigMonitor::Private::updateConfigs(QSharedPointer<KScreen::Config> const&) () at /lib64/libKF5Screen.so.6
#12 0x00007fcb88924f69 in KScreen::ConfigMonitor::Private::edidReady(QDBusPendingCallWatcher*) () at /lib64/libKF5Screen.so.6
#13 0x00007fcb8224d127 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#14 0x00007fcb8301481f in QDBusPendingCallWatcher::finished(QDBusPendingCallWatcher*) () at /lib64/libQt5DBus.so.5
#15 0x00007fcb83015ef5 in QDBusPendingCallWatcher::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5DBus.so.5
#16 0x00007fcb8224e161 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#17 0x00007fcb837d241c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#18 0x00007fcb837d78e6 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#19 0x00007fcb8221e73b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#20 0x00007fcb82220b36 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#21 0x00007fcb82274aa3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#22 0x00007fcb7c95ae3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#23 0x00007fcb7c95b1d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#24 0x00007fcb7c95b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#25 0x00007fcb82274eaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#26 0x00007fcb8221beca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#27 0x00007fcb82223fac in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#28 0x000055663993708a in main ()

Possible duplicates by query: bug 358491, bug 358010, bug 357910, bug 357599, bug 356363.

Reported using DrKonqi