Bug 421727

Application: plasmashell (5.18.5)

Qt Version: 5.14.2
Frameworks Version: 5.70.0
Operating System: Linux 5.3.0-51-generic x86_64
Windowing system: X11
Distribution: KDE neon User Edition 5.18

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

Opening Firefox to browse my email. Suddenly my desktop was gone.

-- 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 0x7f28558e91c0 (LWP 1706))]

Thread 9 (Thread 0x7f27faffd700 (LWP 2200)):
#0  0x00007f284c02f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0dd8bafc4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0dd8baf70, cond=0x55f0dd8baf98) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55f0dd8baf98, mutex=0x55f0dd8baf70) at pthread_cond_wait.c:655
#3  0x00007f284f3ad1db in QWaitConditionPrivate::wait (deadline=..., this=0x55f0dd8baf70) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55f0dd957870, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f284f3ad359 in QWaitCondition::wait (this=this@entry=0x55f0dd957878, mutex=mutex@entry=0x55f0dd957870, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f28534b0233 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55f0dd957868) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55f0dd9577d0) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007f28534b0691 in QSGRenderThread::run (this=0x55f0dd9577d0) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0dd9577d0) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f27faffd700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f27f9b7b700 (LWP 2199)):
#0  0x00007f284c02f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0dc34c174) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0dc34c120, cond=0x55f0dc34c148) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55f0dc34c148, mutex=0x55f0dc34c120) at pthread_cond_wait.c:655
#3  0x00007f284f3ad1db in QWaitConditionPrivate::wait (deadline=..., this=0x55f0dc34c120) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55f0db423a20, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f284f3ad359 in QWaitCondition::wait (this=this@entry=0x55f0db423a28, mutex=mutex@entry=0x55f0db423a20, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f28534b0233 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55f0db423a18) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55f0db423980) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007f28534b0691 in QSGRenderThread::run (this=0x55f0db423980) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0db423980) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f27f9b7b700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f27fbfff700 (LWP 2153)):
#0  0x00007f284c02f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0dbb7ed64) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0dbb7ed10, cond=0x55f0dbb7ed38) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55f0dbb7ed38, mutex=0x55f0dbb7ed10) at pthread_cond_wait.c:655
#3  0x00007f284f3ad1db in QWaitConditionPrivate::wait (deadline=..., this=0x55f0dbb7ed10) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55f0db77bb30, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f284f3ad359 in QWaitCondition::wait (this=this@entry=0x55f0db77bb38, mutex=mutex@entry=0x55f0db77bb30, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f28534b0233 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55f0db77bb28) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55f0db77ba90) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007f28534b0691 in QSGRenderThread::run (this=0x55f0db77ba90) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0db77ba90) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f27fbfff700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f28046ff700 (LWP 2147)):
#0  0x00007f284ec8a0b4 in __GI___libc_read (fd=37, buf=0x7f28046feb50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f2848b582b0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2848b130b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2848b13570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2848b136dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f284f5f57cb in QEventDispatcherGlib::processEvents (this=0x7f27fc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f284f594d2a in QEventLoop::exec (this=this@entry=0x7f28046fed60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f284f3a5757 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#8  0x00007f280705e467 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0db506610) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f28046ff700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f281fe8f700 (LWP 2105)):
#0  0x00007f284ec8ebf9 in __GI___poll (fds=0x7f2818004dd0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2848b135c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2848b136dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f284f5f57cb in QEventDispatcherGlib::processEvents (this=0x7f2818000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f284f594d2a in QEventLoop::exec (this=this@entry=0x7f281fe8ed30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f284f3a5757 in QThread::exec (this=this@entry=0x7f282c088320) at thread/qthread.cpp:536
#6  0x00007f28533f2b06 in QQuickPixmapReader::run (this=0x7f282c088320) at util/qquickpixmapcache.cpp:987
#7  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x7f282c088320) at thread/qthread_unix.cpp:342
#8  0x00007f284c0296db in start_thread (arg=0x7f281fe8f700) at pthread_create.c:463
#9  0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f2824a48700 (LWP 2084)):
#0  0x00007f284c02f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f282c20c7a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f282c20c750, cond=0x7f282c20c778) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f282c20c778, mutex=0x7f282c20c750) at pthread_cond_wait.c:655
#3  0x00007f284f3ad1db in QWaitConditionPrivate::wait (deadline=..., this=0x7f282c20c750) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55f0dae18730, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f284f3ad359 in QWaitCondition::wait (this=this@entry=0x55f0dae18738, mutex=mutex@entry=0x55f0dae18730, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f28534b0233 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55f0dae18728) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55f0dae18690) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007f28534b0691 in QSGRenderThread::run (this=0x55f0dae18690) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0dae18690) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f2824a48700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f2837fff700 (LWP 1958)):
#0  0x00007f284ec8ebf9 in __GI___poll (fds=0x7f282c0029e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2848b135c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2848b136dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f284f5f57cb in QEventDispatcherGlib::processEvents (this=0x7f282c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f284f594d2a in QEventLoop::exec (this=this@entry=0x7f2837ffed80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f284f3a5757 in QThread::exec (this=this@entry=0x55f0da7605d0) at thread/qthread.cpp:536
#6  0x00007f2852f5cfc5 in QQmlThreadPrivate::run (this=0x55f0da7605d0) at qml/ftw/qqmlthread.cpp:155
#7  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x55f0da7605d0) at thread/qthread_unix.cpp:342
#8  0x00007f284c0296db in start_thread (arg=0x7f2837fff700) at pthread_create.c:463
#9  0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f283e0eb700 (LWP 1714)):
#0  0x00007f284ec8a0b4 in __GI___libc_read (fd=7, buf=0x7f283e0eab60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f2848b582b0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2848b130b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2848b13570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2848b136dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f284f5f57cb in QEventDispatcherGlib::processEvents (this=0x7f2830000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f284f594d2a in QEventLoop::exec (this=this@entry=0x7f283e0ead70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f284f3a5757 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#8  0x00007f28512a3555 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f284f3a6c2c in QThreadPrivate::start (arg=0x7f285151bda0) at thread/qthread_unix.cpp:342
#10 0x00007f284c0296db in start_thread (arg=0x7f283e0eb700) at pthread_create.c:463
#11 0x00007f284ec9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f28558e91c0 (LWP 1706)):
[KCrash Handler]
#4  QArrayData::data (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:61
#5  QTypedArrayData<QV4::Value*>::data (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:208
#6  QTypedArrayData<QV4::Value*>::begin (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:211
#7  QVector<QV4::Value*>::realloc (this=0x55f0da7089e8, aalloc=<optimized out>, options=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:720
#8  0x00007f2852d6c6f8 in QVector<QV4::Value*>::append (t=@0x55f0dcdb5560: 0x7f28240f9d38, this=0x55f0da7089e8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:794
#9  QVector<QV4::Value*>::push_back (t=@0x55f0dcdb5560: 0x7f28240f9d38, this=0x55f0da7089e8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:272
#10 QV4::WeakValue::free (this=this@entry=0x55f0dcdb5560) at jsruntime/qv4persistent.cpp:428
#11 0x00007f2852ea9c1e in QV4::WeakValue::clear (this=0x55f0dcdb5560) at ../../include/QtQml/5.14.2/QtQml/private/../../../../../src/qml/jsruntime/qv4persistent_p.h:204
#12 QQmlData::destroyed (this=0x55f0dcdb54f0, object=0x55f0dccfe860) at qml/qqmlengine.cpp:1964
#13 0x00007f284f5cefa3 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1026
#14 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccfe860, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#15 0x00007f2853628b39 in QQuickShaderEffectSource::~QQuickShaderEffectSource (this=0x55f0dccfe860, __in_chrg=<optimized out>) at items/qquickshadereffectsource.cpp:218
#16 0x00007f28271a367b in QGfxSourceProxy::~QGfxSourceProxy (this=0x55f0dccf9950, __in_chrg=<optimized out>) at qgfxsourceproxy.cpp:59
#17 0x00007f282719e575 in QQmlPrivate::QQmlElement<QGfxSourceProxy>::~QQmlElement (this=0x55f0dccf9950, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:111
#18 QQmlPrivate::QQmlElement<QGfxSourceProxy>::~QQmlElement (this=0x55f0dccf9950, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:111
#19 0x00007f284f5c5ceb in QObjectPrivate::deleteChildren (this=0x55f0dccf92a0) at kernel/qobject.cpp:2123
#20 0x00007f284f5cf2ce in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#21 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccf91e0, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#22 0x00007f2853518bb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf91e0, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#23 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf91e0, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#24 0x00007f284f5c5ceb in QObjectPrivate::deleteChildren (this=0x55f0dccf8de0) at kernel/qobject.cpp:2123
#25 0x00007f284f5cf2ce in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#26 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccf8d20, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#27 0x00007f2853518bb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf8d20, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#28 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf8d20, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#29 0x00007f284f5c5ceb in QObjectPrivate::deleteChildren (this=0x55f0dccf8b20) at kernel/qobject.cpp:2123
#30 0x00007f284f5cf2ce in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#31 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccf8a60, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#32 0x00007f2853518bb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf8a60, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#33 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccf8a60, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#34 0x00007f284f5c5ceb in QObjectPrivate::deleteChildren (this=0x55f0dccdc300) at kernel/qobject.cpp:2123
#35 0x00007f284f5cf2ce in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#36 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccdc240, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#37 0x00007f2853518dd5 in QQmlPrivate::QQmlElement<QQuickLoader>::~QQmlElement (this=0x55f0dccdc240, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#38 QQmlPrivate::QQmlElement<QQuickLoader>::~QQmlElement (this=0x55f0dccdc240, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#39 0x00007f284f5c5ceb in QObjectPrivate::deleteChildren (this=0x55f0dccda7a0) at kernel/qobject.cpp:2123
#40 0x00007f284f5cf2ce in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#41 0x00007f28534f822d in QQuickItem::~QQuickItem (this=0x55f0dccda6e0, __in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#42 0x00007f2853518bb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccda6e0, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#43 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55f0dccda6e0, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#44 0x00007f284f5c95a5 in QObject::event (this=this@entry=0x55f0dccda6e0, e=e@entry=0x55f0db6d79b0) at kernel/qobject.cpp:1326
#45 0x00007f28534f54db in QQuickItem::event (this=0x55f0dccda6e0, ev=0x55f0db6d79b0) at items/qquickitem.cpp:8162
#46 0x00007f28508da9ac in QApplicationPrivate::notify_helper (this=this@entry=0x55f0da517870, receiver=receiver@entry=0x55f0dccda6e0, e=e@entry=0x55f0db6d79b0) at kernel/qapplication.cpp:3685
#47 0x00007f28508e1bb0 in QApplication::notify (this=0x7ffe022db320, receiver=0x55f0dccda6e0, e=0x55f0db6d79b0) at kernel/qapplication.cpp:3431
#48 0x00007f284f5964a8 in QCoreApplication::notifyInternal2 (receiver=0x55f0dccda6e0, event=0x55f0db6d79b0) at kernel/qcoreapplication.cpp:1075
#49 0x00007f284f59667e in QCoreApplication::sendEvent (receiver=receiver@entry=0x55f0dccda6e0, event=event@entry=0x55f0db6d79b0) at kernel/qcoreapplication.cpp:1470
#50 0x00007f284f599121 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55f0da50cb00) at kernel/qcoreapplication.cpp:1815
#51 0x00007f284f5996b8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1674
#52 0x00007f284f5f6103 in postEventSourceDispatch (s=0x55f0da566770) at kernel/qeventdispatcher_glib.cpp:277
#53 0x00007f2848b13417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007f2848b13650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007f2848b136dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007f284f5f57ac in QEventDispatcherGlib::processEvents (this=0x55f0da576a10, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#57 0x00007f284f594d2a in QEventLoop::exec (this=this@entry=0x7ffe022db1d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#58 0x00007f284f59e4a0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1383
#59 0x000055f0d8be7894 in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:228

Possible duplicates by query: bug 421685, bug 421610, bug 421528, bug 421466, bug 421453.

Reported using DrKonqi