Bug 359176

Summary: Plasma desktop crashes when adding Activity Pager widget
Product: [Plasma] plasmashell Reporter: Sampo <sampos>
Component: generalAssignee: Marco Martin <notmart>
Status: RESOLVED BACKTRACE    
Severity: crash CC: bshah, ivan.cukic, notmart, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.5.4   
Target Milestone: 1.0   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Sampo 2016-02-09 10:34:23 UTC 
Application: plasmashell (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.2.8-200.fc22.x86_64 x86_64
Distribution: "Fedora release 22 (Twenty Two)"

-- Information about the crash:
- What I was doing when the application crashed:
Adding Activity Pager widget to the desktop (or panel)

- Custom settings of the application:
Two displays, with Xorg ATI driver.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6f615c9900 (LWP 3345))]

Thread 10 (Thread 0x7f6f5a7fc700 (LWP 3348)):
#0  0x00000033934f72fd in poll () at /lib64/libc.so.6
#1  0x000000339740a182 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x000000339740bc77 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f6f5aa57da9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#6  0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f6f53fff700 (LWP 3367)):
#0  0x00007ffdcc6bac2f in clock_gettime ()
#1  0x0000003393510d9d in clock_gettime () at /lib64/libc.so.6
#2  0x000000374ed53956 in qt_gettime() () at /lib64/libQt5Core.so.5
#3  0x000000374eed8949 in QTimerInfoList::updateCurrentTime() () at /lib64/libQt5Core.so.5
#4  0x000000374eed8eb5 in QTimerInfoList::timerWait(timespec&) () at /lib64/libQt5Core.so.5
#5  0x000000374eeda2ae in timerSourcePrepare(_GSource*, int*) () at /lib64/libQt5Core.so.5
#6  0x000000339584935d in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#7  0x0000003395849ceb in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#8  0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#9  0x000000374eedaecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#10 0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#11 0x000000374ec9e434 in QThread::exec() () at /lib64/libQt5Core.so.5
#12 0x00007f6f61d3c9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#13 0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#14 0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#15 0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f6f50d39700 (LWP 3369)):
#0  0x0000003393c0c540 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f6f51def6da in radeon_drm_cs_emit_ioctl () at /usr/lib64/dri/r600_dri.so
#2  0x00007f6f51deee37 in impl_thrd_routine () at /usr/lib64/dri/r600_dri.so
#3  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#4  0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f6f48f20700 (LWP 3370)):
#0  0x0000003393510690 in __libc_disable_asynccancel () at /lib64/libc.so.6
#1  0x00000033934f7309 in poll () at /lib64/libc.so.6
#2  0x0000003395849dbc in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x000000374eedaecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x000000374ec9e434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f6f61d3c9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#10 0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f6f43238700 (LWP 3371)):
#0  0x00007ffdcc6bac2f in clock_gettime ()
#1  0x0000003393510d9d in clock_gettime () at /lib64/libc.so.6
#2  0x000000374ed53956 in qt_gettime() () at /lib64/libQt5Core.so.5
#3  0x000000374eed8949 in QTimerInfoList::updateCurrentTime() () at /lib64/libQt5Core.so.5
#4  0x000000374eed8eb5 in QTimerInfoList::timerWait(timespec&) () at /lib64/libQt5Core.so.5
#5  0x000000374eeda2ae in timerSourcePrepare(_GSource*, int*) () at /lib64/libQt5Core.so.5
#6  0x000000339584935d in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#7  0x0000003395849ceb in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#8  0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#9  0x000000374eedaecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#10 0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#11 0x000000374ec9e434 in QThread::exec() () at /lib64/libQt5Core.so.5
#12 0x00007f6f61d3c9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#13 0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#14 0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#15 0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f6f4190a700 (LWP 3372)):
#0  0x0000003393c0c540 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x000000375db85514 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x000000375db85559 in  () at /lib64/libQt5Script.so.5
#3  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#4  0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f6eba77a700 (LWP 3373)):
#0  0x000000339588eee4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x0000003395849969 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#2  0x0000003395849e20 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x000000374eedaecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x000000374ec9e434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f6f621858d6 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#8  0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#10 0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f6eaf664700 (LWP 3376)):
#0  0x00007ffdcc6bac2f in clock_gettime ()
#1  0x0000003393510d9d in clock_gettime () at /lib64/libc.so.6
#2  0x000000374ed53956 in qt_gettime() () at /lib64/libQt5Core.so.5
#3  0x000000374eed8949 in QTimerInfoList::updateCurrentTime() () at /lib64/libQt5Core.so.5
#4  0x000000374eeda692 in timerSourceCheck(_GSource*) () at /lib64/libQt5Core.so.5
#5  0x0000003395849801 in g_main_context_check () at /lib64/libglib-2.0.so.0
#6  0x0000003395849d60 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#7  0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#8  0x000000374eedaecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#9  0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#10 0x000000374ec9e434 in QThread::exec() () at /lib64/libQt5Core.so.5
#11 0x00007f6eafe99397 in KCupsConnection::run() () at /lib64/libkcupslib.so
#12 0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#13 0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#14 0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f6e95ffa700 (LWP 3394)):
#0  0x0000003393c0c8e9 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x000000374eca45a6 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib64/libQt5Core.so.5
#2  0x000000374eca0063 in QThreadPoolThread::run() () at /lib64/libQt5Core.so.5
#3  0x000000374eca33de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#4  0x0000003393c07555 in start_thread () at /lib64/libpthread.so.0
#5  0x0000003393502b9d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f6f615c9900 (LWP 3345)):
[KCrash Handler]
#5  0x0000003344a11711 in KActivities::Info::Info(QString const&, QObject*) () at /lib64/libKF5Activities.so.5
#6  0x00007f6e9b73ac9a in ActivityPager::updateSizes() () at /usr/lib64/qt5/qml/org/kde/plasma/private/activitypager/libactivitypagerplugin.so
#7  0x00007f6e9b73b64a in ActivityPager::ActivityPager(QObject*) () at /usr/lib64/qt5/qml/org/kde/plasma/private/activitypager/libactivitypagerplugin.so
#8  0x00007f6e9b73e2c0 in void QQmlPrivate::createInto<ActivityPager>(void*) () at /usr/lib64/qt5/qml/org/kde/plasma/private/activitypager/libactivitypagerplugin.so
#9  0x00007f6f61cd4dfb in QQmlType::create() const () at /lib64/libQt5Qml.so.5
#10 0x00007f6f61d36444 in QQmlObjectCreator::createInstance(int, QObject*, bool) () at /lib64/libQt5Qml.so.5
#11 0x00007f6f61d38843 in QQmlObjectCreator::setPropertyBinding(QQmlPropertyData const*, QV4::CompiledData::Binding const*) () at /lib64/libQt5Qml.so.5
#12 0x00007f6f61d38ad8 in QQmlObjectCreator::setupBindings(QBitArray const&) () at /lib64/libQt5Qml.so.5
#13 0x00007f6f61d3507a in QQmlObjectCreator::populateInstance(int, QObject*, QObject*, QQmlPropertyData const*, QBitArray const&) () at /lib64/libQt5Qml.so.5
#14 0x00007f6f61d359da in QQmlObjectCreator::createInstance(int, QObject*, bool) () at /lib64/libQt5Qml.so.5
#15 0x00007f6f61d36edf in QQmlObjectCreator::create(int, QObject*, QQmlInstantiationInterrupt*) () at /lib64/libQt5Qml.so.5
#16 0x00007f6f61cc16a7 in QQmlIncubatorPrivate::incubate(QQmlInstantiationInterrupt&) () at /lib64/libQt5Qml.so.5
#17 0x00007f6f61cc1f94 in QQmlIncubationController::incubateFor(int) () at /lib64/libQt5Qml.so.5
#18 0x0000003346a0e62c in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) () at /lib64/libKF5Declarative.so.5
#19 0x00007f6f61cc1da9 in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /lib64/libQt5Qml.so.5
#20 0x00007f6f61cbd51c in QQmlComponent::create(QQmlIncubator&, QQmlContext*, QQmlContext*) () at /lib64/libQt5Qml.so.5
#21 0x0000003346a0ab5f in KDeclarative::QmlObject::completeInitialization(QHash<QString, QVariant> const&) () at /lib64/libKF5Declarative.so.5
#22 0x0000003343e20687 in PlasmaQuick::AppletQuickItem::init() () at /lib64/libKF5PlasmaQuick.so.5
#23 0x00007f6f4324eb44 in AppletInterface::init() () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#24 0x0000003343e218e8 in PlasmaQuick::AppletQuickItem::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () at /lib64/libKF5PlasmaQuick.so.5
#25 0x00007f6f6221567e in QQuickItemPrivate::refWindow(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#26 0x00007f6f62217f64 in QQuickItem::setParentItem(QQuickItem*) () at /lib64/libQt5Quick.so.5
#27 0x00007f6f6221a941 in QQuickItem::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Quick.so.5
#28 0x00007f6f6221b09b in QQuickItem::qt_metacall(QMetaObject::Call, int, void**) () at /lib64/libQt5Quick.so.5
#29 0x0000003343e21965 in PlasmaQuick::AppletQuickItem::qt_metacall(QMetaObject::Call, int, void**) () at /lib64/libKF5PlasmaQuick.so.5
#30 0x00007f6f4324fab5 in AppletInterface::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#31 0x000000374ee92ef4 in QMetaProperty::write(QObject*, QVariant const&) const () at /lib64/libQt5Core.so.5
#32 0x000000374eebb89f in QObject::setProperty(char const*, QVariant const&) () at /lib64/libQt5Core.so.5
#33 0x00007f6f432548eb in ContainmentInterface::appletAddedForward(Plasma::Applet*) [clone .part.152] [clone .constprop.185] () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#34 0x000000374eeb3127 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#35 0x000000334723b04f in Plasma::Containment::appletAdded(Plasma::Applet*) () at /lib64/libKF5Plasma.so.5
#36 0x000000334723d1e2 in Plasma::Containment::addApplet(Plasma::Applet*) () at /lib64/libKF5Plasma.so.5
#37 0x000000334725071e in Plasma::ContainmentPrivate::createApplet(QString const&, QList<QVariant> const&, unsigned int) () at /lib64/libKF5Plasma.so.5
#38 0x000000334723b7c4 in Plasma::Containment::createApplet(QString const&, QList<QVariant> const&) () at /lib64/libKF5Plasma.so.5
#39 0x00007f6f43252308 in ContainmentInterface::createApplet(QString const&, QList<QVariant> const&, QPoint const&) () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#40 0x00007f6f4325bfa9 in ContainmentInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#41 0x000000374eeb4161 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#42 0x00007f6f62216ebb in QQuickItem::event(QEvent*) () at /lib64/libQt5Quick.so.5
#43 0x00007f6f4324eee6 in AppletInterface::event(QEvent*) () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#44 0x000000375055441c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#45 0x00000037505598e6 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#46 0x000000374ee8473b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#47 0x000000374ee86b36 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#48 0x000000374eedaaa3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#49 0x0000003395849a8a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#50 0x0000003395849e20 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#51 0x0000003395849ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#52 0x000000374eedaeaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#53 0x000000374ee81eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#54 0x000000374ee89fac in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#55 0x00000000004314da in main ()

Reported using DrKonqi
Comment 1 Marco Martin 2016-02-11 09:27:38 UTC 
debug symbols for kdeplasma-addons and kactivities would be needed as well.
Ivan, any idea why KActivities::Info() ctor may crash?
Comment 2 Sampo 2016-02-11 10:09:17 UTC 
I installed the debuginfo packages and was going to re-produce this again, but now it does not crash any more. So I can no longer re-produce this...