Bug 359144

Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-27-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed: Plasma crashed after I empty clipboard. It stayed almost one minut freezing before it crashed.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2f27eb9800 (LWP 1542))]

Thread 8 (Thread 0x7f2f13515700 (LWP 1545)):
#0  0x00007f2f226698dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f2f266b0bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f2f266b274f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f2f1585fa39 in QXcbEventReader::run (this=0x1e6f810) at qxcbconnection.cpp:1105
#4  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x1e6f810) at thread/qthread_unix.cpp:337
#5  0x00007f2f21e4b6aa in start_thread (arg=0x7f2f13515700) at pthread_create.c:333
#6  0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f2f10e7b700 (LWP 1566)):
#0  0x00007f2f1f45a869 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2f1f4160f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f22f9329b in QEventDispatcherGlib::processEvents (this=0x7f2f040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7f2f10e7ada0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2f22d573d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f2f2557ff85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x1f37600) at thread/qthread_unix.cpp:337
#8  0x00007f2f21e4b6aa in start_thread (arg=0x7f2f10e7b700) at pthread_create.c:333
#9  0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f2f01761700 (LWP 1568)):
#0  0x00007f2f1f413237 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2f1f41571b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f1f41611b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2f22f9329b in QEventDispatcherGlib::processEvents (this=0x7f2efc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7f2f01760da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2f22d573d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f2f2557ff85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x22c4570) at thread/qthread_unix.cpp:337
#9  0x00007f2f21e4b6aa in start_thread (arg=0x7f2f01761700) at pthread_create.c:333
#10 0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f2efafa6700 (LWP 1572)):
#0  0x00007f2f1f45a884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2f1f415770 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f1f41611b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2f22f9329b in QEventDispatcherGlib::processEvents (this=0x7f2eec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7f2efafa5da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2f22d573d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f2f2557ff85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x23fc860) at thread/qthread_unix.cpp:337
#9  0x00007f2f21e4b6aa in start_thread (arg=0x7f2efafa6700) at pthread_create.c:333
#10 0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f2ef96ea700 (LWP 1581)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2f2790b114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f2f2790b159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f2f21e4b6aa in start_thread (arg=0x7f2ef96ea700) at pthread_create.c:333
#4  0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f2ef184f700 (LWP 1739)):
#0  0x00007f2f1f45a884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2f1f4161e1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f22f9329b in QEventDispatcherGlib::processEvents (this=0x7f2e68003e40, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7f2ef184ed50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2f22d573d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f2f25efbef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x24fa890) at thread/qthread_unix.cpp:337
#8  0x00007f2f21e4b6aa in start_thread (arg=0x7f2ef184f700) at pthread_create.c:333
#9  0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f2e5f29e700 (LWP 1746)):
#0  0x00007f2f226698dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f2f1f4161ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f22f9329b in QEventDispatcherGlib::processEvents (this=0x7f2e580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7f2e5f29dd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2f22d573d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f2e615358f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f2f22d5c2be in QThreadPrivate::start (arg=0x569abe0) at thread/qthread_unix.cpp:337
#8  0x00007f2f21e4b6aa in start_thread (arg=0x7f2e5f29e700) at pthread_create.c:333
#9  0x00007f2f22674eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f2f27eb9800 (LWP 1542)):
[KCrash Handler]
#6  0x00007f2f25505a84 in QQmlContext::isValid() const () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f2f254f6a05 in QQmlExpression::QQmlExpression(QQmlScriptString const&, QQmlContext*, QObject*, QObject*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f2f25ed92ac in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f2f255b998d in QAbstractAnimationJob::setState(QAbstractAnimationJob::State) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f2f255bb22c in QSequentialAnimationGroupJob::activateCurrentAnimation(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f2f255bb31c in QSequentialAnimationGroupJob::uncontrolledAnimationFinished(QAbstractAnimationJob*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f2f255b8f1f in QAbstractAnimationJob::finished() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f2f255b9a88 in QAbstractAnimationJob::setState(QAbstractAnimationJob::State) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f2f25f1e019 in QQuickAnimatorProxyJob::setWindow(QQuickWindow*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f2f22f6c78a in QMetaObject::activate (sender=0x770d2b0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3717
#16 0x00007f2f25f7ce72 in QQuickItem::windowChanged(QQuickWindow*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f2f25f890f3 in QQuickItemPrivate::derefWindow() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f2f25f8bbcc in QQuickItem::setParentItem(QQuickItem*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f2f25f8c086 in QQuickItem::~QQuickItem() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f2f25fa67c6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f2f22f6d670 in QObject::event (this=0x770d2b0, e=<optimized out>) at kernel/qobject.cpp:1236
#22 0x00007f2f25f8a10b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f2f23a19b8c in QApplicationPrivate::notify_helper (this=this@entry=0x1e58480, receiver=receiver@entry=0x770d2b0, e=e@entry=0x8013620) at kernel/qapplication.cpp:3720
#24 0x00007f2f23a1f230 in QApplication::notify (this=0x7ffc9147bc50, receiver=0x770d2b0, e=0x8013620) at kernel/qapplication.cpp:3503
#25 0x00007f2f22f3bf1b in QCoreApplication::notifyInternal (this=0x7ffc9147bc50, receiver=0x770d2b0, event=event@entry=0x8013620) at kernel/qcoreapplication.cpp:935
#26 0x00007f2f22f3e057 in QCoreApplication::sendEvent (event=0x8013620, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1e4dd70) at kernel/qcoreapplication.cpp:1552
#28 0x00007f2f22f3e588 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#29 0x00007f2f22f92e73 in postEventSourceDispatch (s=0x1e98260) at kernel/qeventdispatcher_glib.cpp:271
#30 0x00007f2f1f415ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f2f1f416250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f2f1f4162fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f2f22f9327f in QEventDispatcherGlib::processEvents (this=0x1e8b790, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#34 0x00007f2f22f3975a in QEventLoop::exec (this=this@entry=0x7ffc9147bad0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x00007f2f22f412cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#36 0x00007f2f2325600c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#37 0x00007f2f23a16025 in QApplication::exec () at kernel/qapplication.cpp:2956
#38 0x00000000004322c3 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 359040, bug 357995, bug 357834, bug 356991, bug 356191.

Reported using DrKonqi