Panels crash, disappear, restart themselves successfully.

All windows appear to keep working perfectly. No desktop widgets in this configuration, two monitors, each with a panel.

Reproducible: Didn't try




Application: plasma-desktop (4.11.13)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-4-amd64 x86_64
Distribution: Debian GNU/Linux 8.1 (jessie)

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f73c6ab3800 (LWP 1685))]

Thread 8 (Thread 0x7f7399126700 (LWP 1686)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73bf4addea in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f73bf7aef80 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f73bf4ade19 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f73b9cdb0a4 in start_thread (arg=0x7f7399126700) at pthread_create.c:309
#4  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f7312b7a700 (LWP 1689)):
#0  0x00007f73c639e50d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f73b93b7ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f73b93b7ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f73c2e62d37 in QEventDispatcherGlib::processEvents (this=0x7f73040008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f73c2e32271 in QEventLoop::processEvents (this=this@entry=0x7f7312b79d80, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f73c2e325d5 in QEventLoop::exec (this=this@entry=0x7f7312b79d80, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f73c2d26e99 in QThread::exec (this=this@entry=0xedc9c0) at thread/qthread.cpp:538
#7  0x00007f73c2e12ac3 in QInotifyFileSystemWatcherEngine::run (this=0xedc9c0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f73c2d2970f in QThreadPrivate::start (arg=0xedc9c0) at thread/qthread_unix.cpp:349
#9  0x00007f73b9cdb0a4 in start_thread (arg=0x7f7312b7a700) at pthread_create.c:309
#10 0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f72fca7f700 (LWP 11733)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73c2d29c66 in wait (time=18446744073709551615, this=0x103f920) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x11115b8, mutex=0xfcc0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f73be70d86c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1111590, th=0x363a9a0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f73be710743 in ThreadWeaver::WorkingHardState::applyForWork (this=0x10cfcf0, th=0x363a9a0, previous=0x3693490) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f73be70f22f in ThreadWeaver::Thread::run (this=0x363a9a0) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f73c2d2970f in QThreadPrivate::start (arg=0x363a9a0) at thread/qthread_unix.cpp:349
#7  0x00007f73b9cdb0a4 in start_thread (arg=0x7f72fca7f700) at pthread_create.c:309
#8  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f72fd280700 (LWP 11734)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73c2d29c66 in wait (time=18446744073709551615, this=0x103f920) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x11115b8, mutex=0xfcc0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f73be70d86c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1111590, th=0x2babbe0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f73be710743 in ThreadWeaver::WorkingHardState::applyForWork (this=0x10cfcf0, th=0x2babbe0, previous=0x3bbdc40) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f73be70f22f in ThreadWeaver::Thread::run (this=0x2babbe0) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f73c2d2970f in QThreadPrivate::start (arg=0x2babbe0) at thread/qthread_unix.cpp:349
#7  0x00007f73b9cdb0a4 in start_thread (arg=0x7f72fd280700) at pthread_create.c:309
#8  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f7312379700 (LWP 11735)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73c2d29c66 in wait (time=18446744073709551615, this=0x103f920) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x11115b8, mutex=0xfcc0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f73be70d86c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1111590, th=0x1fd3400) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f73be710743 in ThreadWeaver::WorkingHardState::applyForWork (this=0x10cfcf0, th=0x1fd3400, previous=0x3b89dc0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f73be70f22f in ThreadWeaver::Thread::run (this=0x1fd3400) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f73c2d2970f in QThreadPrivate::start (arg=0x1fd3400) at thread/qthread_unix.cpp:349
#7  0x00007f73b9cdb0a4 in start_thread (arg=0x7f7312379700) at pthread_create.c:309
#8  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f72effff700 (LWP 11736)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73c2d29c66 in wait (time=18446744073709551615, this=0x103f920) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x11115b8, mutex=0xfcc0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f73be70d86c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1111590, th=0x2e0ca00) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f73be710743 in ThreadWeaver::WorkingHardState::applyForWork (this=0x10cfcf0, th=0x2e0ca00, previous=0x35f3460) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f73be70f22f in ThreadWeaver::Thread::run (this=0x2e0ca00) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f73c2d2970f in QThreadPrivate::start (arg=0x2e0ca00) at thread/qthread_unix.cpp:349
#7  0x00007f73b9cdb0a4 in start_thread (arg=0x7f72effff700) at pthread_create.c:309
#8  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f72ef7fe700 (LWP 11737)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f73c2d29c66 in wait (time=18446744073709551615, this=0x103f920) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x11115b8, mutex=0xfcc0c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f73be70d86c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1111590, th=0x2fe4f30) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f73be710743 in ThreadWeaver::WorkingHardState::applyForWork (this=0x10cfcf0, th=0x2fe4f30, previous=0x3831540) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f73be70f22f in ThreadWeaver::Thread::run (this=0x2fe4f30) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f73c2d2970f in QThreadPrivate::start (arg=0x2fe4f30) at thread/qthread_unix.cpp:349
#7  0x00007f73b9cdb0a4 in start_thread (arg=0x7f72ef7fe700) at pthread_create.c:309
#8  0x00007f73c63a704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f73c6ab3800 (LWP 1685)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f739b5866fc in TaskManager::TasksModel::rowCount(QModelIndex const&) const () from /usr/lib/libtaskmanager.so.4abi4
#8  0x00007f73c4b01b8a in QDeclarativeVisualDataModel::_q_layoutChanged (this=0x12aae60) at graphicsitems/qdeclarativevisualitemmodel.cpp:1398
#9  0x00007f73c4c35a25 in QDeclarativeVisualDataModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:406
#10 0x00007f73c2e4871c in QMetaObject::activate (sender=sender@entry=0x1270400, m=m@entry=0x7f73c3198860 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x0) at kernel/qobject.cpp:3567
#11 0x00007f73c2e94b53 in QAbstractItemModel::layoutChanged (this=this@entry=0x1270400) at .moc/release-shared/moc_qabstractitemmodel.cpp:176
#12 0x00007f73c2e2bee0 in QAbstractItemModel::endMoveRows (this=0x1270400) at kernel/qabstractitemmodel.cpp:2673
#13 0x00007f739b587a9c in ?? () from /usr/lib/libtaskmanager.so.4abi4
#14 0x00007f73c2e4871c in QMetaObject::activate (sender=0xd5f000, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffdae2c5af0) at kernel/qobject.cpp:3567
#15 0x00007f739b579462 in TaskManager::TaskGroup::itemPositionChanged(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4abi4
#16 0x00007f739b57b63a in TaskManager::TaskGroup::moveItem(int, int) () from /usr/lib/libtaskmanager.so.4abi4
#17 0x00007f739b55a835 in TaskManager::AbstractSortingStrategy::check(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4abi4
#18 0x00007f739b55d4ee in ?? () from /usr/lib/libtaskmanager.so.4abi4
#19 0x00007f739b55df0d in ?? () from /usr/lib/libtaskmanager.so.4abi4
#20 0x00007f739b561b02 in ?? () from /usr/lib/libtaskmanager.so.4abi4
#21 0x00007f73c2e4871c in QMetaObject::activate (sender=0xf37bc0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffdae2c5df0) at kernel/qobject.cpp:3567
#22 0x00007f739b582d07 in TaskManager::TaskManager::windowChanged(TaskManager::Task*, QFlags<TaskManager::TaskChange>) () from /usr/lib/libtaskmanager.so.4abi4
#23 0x00007f739b582efb in TaskManager::TaskManager::taskChanged(QFlags<TaskManager::TaskChange>) () from /usr/lib/libtaskmanager.so.4abi4
#24 0x00007f739b585201 in ?? () from /usr/lib/libtaskmanager.so.4abi4
#25 0x00007f73c2e4871c in QMetaObject::activate (sender=0x1a451a0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffdae2c5fe0) at kernel/qobject.cpp:3567
#26 0x00007f739b570892 in TaskManager::Task::changed(QFlags<TaskManager::TaskChange>) () from /usr/lib/libtaskmanager.so.4abi4
#27 0x00007f739b570970 in TaskManager::Task::setActive(bool) () from /usr/lib/libtaskmanager.so.4abi4
#28 0x00007f739b58340c in TaskManager::TaskManager::activeWindowChanged(unsigned long) () from /usr/lib/libtaskmanager.so.4abi4
#29 0x00007f739b58540c in ?? () from /usr/lib/libtaskmanager.so.4abi4
#30 0x00007f73c2e4871c in QMetaObject::activate (sender=sender@entry=0xa30120, m=m@entry=0x7f73c3f8e400 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffdae2c61e0) at kernel/qobject.cpp:3567
#31 0x00007f73c3c90c92 in KWindowSystem::activeWindowChanged (this=this@entry=0xa30120, _t1=75497490) at ./kwindowsystem.moc:156
#32 0x00007f73c3c91f86 in KWindowSystemPrivate::x11Event (this=0xa6a940, ev=0x7ffdae2c6330) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:197
#33 0x00007f73c3b8339e in publicX11Event (e=0x7ffdae2c6330, this=<optimized out>) at ../../kdeui/kernel/ksystemeventfilter.cpp:43
#34 KSystemEventFilterPrivate::filterEvent (this=0x9e5090, message=0x7ffdae2c6330) at ../../kdeui/kernel/ksystemeventfilter.cpp:102
#35 0x00007f73c2e24d6e in QAbstractEventDispatcher::filterEvent (this=<optimized out>, message=message@entry=0x7ffdae2c6330) at kernel/qabstracteventdispatcher.cpp:542
#36 0x00007f73c2228e0c in x11EventSourceDispatch (s=0x943f20, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:143
#37 0x00007f73b93b7c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f73b93b7f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f73b93b7ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f73c2e62d1d in QEventDispatcherGlib::processEvents (this=0x870b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#41 0x00007f73c2228f96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f73c2e32271 in QEventLoop::processEvents (this=this@entry=0x7ffdae2c6710, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f73c2e325d5 in QEventLoop::exec (this=this@entry=0x7ffdae2c6710, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f73c2e38059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#45 0x00007f73c66aa4bd in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#46 0x00007f73c62e2b45 in __libc_start_main (main=0x4006f0, argc=1, argv=0x7ffdae2c6968, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdae2c6958) at libc-start.c:287
#47 0x000000000040071e in _start ()

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