Application: plasmashell (5.13.0)

Qt Version: 5.11.0
Frameworks Version: 5.47.0
Operating System: Linux 4.13.0-45-generic x86_64
Distribution: KDE neon User Edition 5.13

-- Information about the crash:
- What I was doing when the application crashed:  After clicking on the desktop "hamburger" menu icon, I selected "Activities...".  Immediately afterwards, the the crash happened.

- Unusual behavior I noticed:  Software Center Discover refused to start prior to the Plasma crash.

-- 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 0x7f5905a9c940 (LWP 1234))]

Thread 9 (Thread 0x7f582f5ea700 (LWP 2692)):
#0  0x00007f58f2f5a45c in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#1  0x00007f58f2f5a789 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#2  0x00007f58f2f5b01a in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#3  0x00007f58f71ff0b7 in pa_mainloop_dispatch () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f58f71ff4bc in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f58f71ff560 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f58f720d7a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f58f2f6b078 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#8  0x00007f58fe1526ba in start_thread (arg=0x7f582f5ea700) at pthread_create.c:333
#9  0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5837842700 (LWP 1528)):
#0  0x00007f58febbe74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f58f8f3d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f58f8f3d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f58ff4e1beb in QEventDispatcherGlib::processEvents (this=0x7f58300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f58ff4891ca in QEventLoop::exec (this=this@entry=0x7f5837841c30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f58ff2be5e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007f5839d5bf37 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f58ff2c9727 in QThreadPrivate::start (arg=0x2682510) at thread/qthread_unix.cpp:367
#8  0x00007f58fe1526ba in start_thread (arg=0x7f5837842700) at pthread_create.c:333
#9  0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f584b722700 (LWP 1463)):
#0  0x00007f58febba281 in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f58f8f806f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f58f8f3ce74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f58f8f3d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f58f8f3d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f58ff4e1beb in QEventDispatcherGlib::processEvents (this=0x7f58440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f58ff4891ca in QEventLoop::exec (this=this@entry=0x7f584b721c00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#7  0x00007f58ff2be5e4 in QThread::exec (this=this@entry=0x1aa70e0) at thread/qthread.cpp:522
#8  0x00007f59032c4e66 in QQuickPixmapReader::run (this=0x1aa70e0) at util/qquickpixmapcache.cpp:934
#9  0x00007f58ff2c9727 in QThreadPrivate::start (arg=0x1aa70e0) at thread/qthread_unix.cpp:367
#10 0x00007f58fe1526ba in start_thread (arg=0x7f584b722700) at pthread_create.c:333
#11 0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5855f11700 (LWP 1420)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f585accc48b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f585accc397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f58fe1526ba in start_thread (arg=0x7f5855f11700) at pthread_create.c:333
#4  0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5856712700 (LWP 1419)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f585accc48b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f585accc397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f58fe1526ba in start_thread (arg=0x7f5856712700) at pthread_create.c:333
#4  0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f58dbfff700 (LWP 1416)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5905207e04 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f5905207e49 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f58fe1526ba in start_thread (arg=0x7f58dbfff700) at pthread_create.c:333
#4  0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f58e6fba700 (LWP 1298)):
#0  0x00007f58ff2ba709 in std::__atomic_base<QMutexData*>::compare_exchange_strong (__m2=std::memory_order_relaxed, __m1=std::memory_order_release, __p2=0x0, __p1=@0x7f58e6fb9a38: 0x1, this=0x13ce450) at /usr/include/c++/5/bits/atomic_base.h:752
#1  std::atomic<QMutexData*>::compare_exchange_strong (__m2=std::memory_order_relaxed, __m1=std::memory_order_release, __p2=0x0, __p1=@0x7f58e6fb9a38: 0x1, this=0x13ce450) at /usr/include/c++/5/atomic:462
#2  QAtomicOps<QMutexData*>::testAndSetRelease<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:299
#3  QBasicAtomicPointer<QMutexData>::testAndSetRelease (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=<optimized out>, this=0x13ce450) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:253
#4  QBasicMutex::fastTryUnlock (current=<synthetic pointer>, this=0x13ce450) at thread/qmutex.h:110
#5  QMutex::unlock (this=this@entry=0x13ce450) at thread/qmutex.cpp:337
#6  0x00007f58ff4e2015 in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:219
#7  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:213
#8  QThreadData::canWaitLocked (this=<optimized out>) at ../../include/QtCore/5.11.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:254
#9  postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7f58dc0012d0) at kernel/qeventdispatcher_glib.cpp:259
#10 postEventSourceCheck (source=0x7f58dc0012d0) at kernel/qeventdispatcher_glib.cpp:269
#11 0x00007f58f8f3cdc1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f58f8f3d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f58f8f3d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f58ff4e1beb in QEventDispatcherGlib::processEvents (this=0x7f58dc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#15 0x00007f58ff4891ca in QEventLoop::exec (this=this@entry=0x7f58e6fb9c50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#16 0x00007f58ff2be5e4 in QThread::exec (this=this@entry=0x13ce860) at thread/qthread.cpp:522
#17 0x00007f5902e33cf5 in QQmlThreadPrivate::run (this=0x13ce860) at qml/ftw/qqmlthread.cpp:148
#18 0x00007f58ff2c9727 in QThreadPrivate::start (arg=0x13ce860) at thread/qthread_unix.cpp:367
#19 0x00007f58fe1526ba in start_thread (arg=0x7f58e6fba700) at pthread_create.c:333
#20 0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f58ecbda700 (LWP 1252)):
#0  0x00007f58f8f81a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f58f8f3cdcc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f58f8f3d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f58f8f3d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f58ff4e1beb in QEventDispatcherGlib::processEvents (this=0x7f58e00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f58ff4891ca in QEventLoop::exec (this=this@entry=0x7f58ecbd9c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f58ff2be5e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007f5901848f35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f58ff2c9727 in QThreadPrivate::start (arg=0x7f5901ac1d60) at thread/qthread_unix.cpp:367
#9  0x00007f58fe1526ba in start_thread (arg=0x7f58ecbda700) at pthread_create.c:333
#10 0x00007f58febca41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5905a9c940 (LWP 1234)):
[KCrash Handler]
#6  0x00007f5902cad848 in QV4::CppStackFrame::source (this=this@entry=0x7ffe88f9bf18) at jsruntime/qv4engine.cpp:771
#7  0x00007f5902cb2705 in QV4::ExecutionEngine::stackTrace (this=this@entry=0x13cc890, frameLimit=frameLimit@entry=-1) at jsruntime/qv4engine.cpp:807
#8  0x00007f5902cd8084 in QV4::Heap::ErrorObject::init (this=0x7f582d76cd60, message=..., t=t@entry=QV4::Heap::ErrorObject::Error) at jsruntime/qv4errorobject.cpp:97
#9  0x00007f5902cacd1e in QV4::MemoryManager::allocObject<QV4::URIErrorObject, QV4::Value> (prototype=<optimized out>, arg1=..., ic=<optimized out>, this=<optimized out>) at ../../include/QtQml/5.11.0/QtQml/private/../../../../../src/qml/memory/qv4mm_p.h:247
#10 QV4::ErrorObject::create<QV4::ErrorObject> (message=..., e=0x7f58e637b3a0) at jsruntime/qv4errorobject_p.h:333
#11 QV4::ExecutionEngine::newErrorObject (this=this@entry=0x13cc890, value=...) at jsruntime/qv4engine.cpp:681
#12 0x00007f5902cb294b in QV4::ExecutionEngine::throwError (this=this@entry=0x13cc890, message=...) at jsruntime/qv4engine.cpp:964
#13 0x00007f5902d52229 in QV4::QObjectWrapper::put (m=<optimized out>, name=0x7f58e637b358, value=...) at jsruntime/qv4qobjectwrapper.cpp:713
#14 0x00007f5902d9ebdf in QV4::Object::put (v=..., name=<optimized out>, this=<optimized out>) at ../../include/QtQml/5.11.0/QtQml/private/../../../../../src/qml/jsruntime/qv4object_p.h:370
#15 QQmlComponentPrivate::setInitialProperties (engine=engine@entry=0x13cc890, qmlContext=qmlContext@entry=0x7f58e637b328, o=..., v=...) at qml/qqmlcomponent.cpp:1255
#16 0x00007f5902d9ecd0 in QQmlComponentPrivate::initializeObjectWithInitialProperties (this=<optimized out>, qmlContext=0x7f58e637b328, valuemap=..., toCreate=toCreate@entry=0x54eb6e0) at qml/qqmlcomponent.cpp:1453
#17 0x00007f590342914a in QQuickLoaderPrivate::setInitialState (this=0x16c8320, obj=0x54eb6e0) at items/qquickloader.cpp:669
#18 0x00007f5902da2573 in QQmlIncubatorPrivate::incubate (this=this@entry=0x4002470, i=...) at qml/qqmlincubator.cpp:318
#19 0x00007f5902da2995 in QQmlEnginePrivate::incubate (this=this@entry=0x14b2520, i=..., forContext=forContext@entry=0x3de3b60) at qml/qqmlincubator.cpp:89
#20 0x00007f5902d9d7e4 in QQmlComponent::create (this=<optimized out>, incubator=..., context=<optimized out>, forContext=forContext@entry=0x0) at qml/qqmlcomponent.cpp:1063
#21 0x00007f590342806a in QQuickLoaderPrivate::_q_sourceLoaded (this=0x16c8320) at items/qquickloader.cpp:741
#22 0x00007f5903428c09 in QQuickLoader::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qquickloader_p.cpp:166
#23 0x00007f58ff4b7b89 in QMetaObject::activate (sender=sender@entry=0x4961660, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe88f9c360) at kernel/qobject.cpp:3771
#24 0x00007f58ff4b8497 in QMetaObject::activate (sender=sender@entry=0x4961660, m=m@entry=0x7f590317cc80 <QQmlComponent::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe88f9c360) at kernel/qobject.cpp:3633
#25 0x00007f5902d9c54e in QQmlComponent::statusChanged (this=this@entry=0x4961660, _t1=QQmlComponent::Ready) at .moc/moc_qqmlcomponent.cpp:244
#26 0x00007f5902d9f590 in QQmlComponentPrivate::typeDataReady (this=0x389ca90) at qml/qqmlcomponent.cpp:324
#27 0x00007f5902dc3581 in QQmlTypeData::completed (this=0x47a21f0) at qml/qqmltypeloader.cpp:2401
#28 0x00007f5902dbb3da in QQmlTypeLoaderThread::callCompletedMain (this=<optimized out>, b=0x47a21f0) at qml/qqmltypeloader.cpp:909
#29 0x00007f5902e33f7c in QQmlThreadPrivate::mainEvent (this=0x13ce860) at qml/ftw/qqmlthread.cpp:163
#30 0x00007f5902e346ae in QQmlThreadPrivate::MainObject::event (this=0x13ce8b8, e=0x7f58dc70ce40) at qml/ftw/qqmlthread.cpp:121
#31 0x00007f5900b3529c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f5900b3c917 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f58ff48ae38 in QCoreApplication::notifyInternal2 (receiver=0x13ce8b8, event=event@entry=0x7f58dc70ce40) at kernel/qcoreapplication.cpp:1048
#34 0x00007f58ff48da3e in QCoreApplication::sendEvent (event=0x7f58dc70ce40, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#35 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x12e2be0) at kernel/qcoreapplication.cpp:1745
#36 0x00007f58ff48deb8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#37 0x00007f58ff4e25c3 in postEventSourceDispatch (s=0x1344ba0) at kernel/qeventdispatcher_glib.cpp:276
#38 0x00007f58f8f3d197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f58f8f3d3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f58f8f3d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f58ff4e1bcf in QEventDispatcherGlib::processEvents (this=0x1342c70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#42 0x00007f58f0c3fc11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x00007f58ff4891ca in QEventLoop::exec (this=this@entry=0x7ffe88f9c970, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#44 0x00007f58ff4922d4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#45 0x000000000041da25 in ?? ()
#46 0x00007f58feae3830 in __libc_start_main (main=0x41ced0, argc=1, argv=0x7ffe88f9cc88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe88f9cc78) at ../csu/libc-start.c:291
#47 0x000000000041de89 in _start ()

Reported using DrKonqi