Bug 381135

Application: plasmashell (5.10.1)

Qt Version: 5.7.1
Frameworks Version: 5.35.0
Operating System: Linux 4.4.0-79-generic x86_64
Distribution: KDE neon User Edition 5.10

-- Information about the crash:
- What I was doing when the application crashed:
 1. Click on Widget icon.
 2. Crash \o/

- Since kde 5.10, still crash on 5.10.1 just updated (framework 5.35) on Kde Neon User Édition.

N.B. :
Can not select has « duplicate of #375189 » from bugs wizard

The crash can be reproduced every time.

-- 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 0x7f4f87b738c0 (LWP 1459))]

Thread 10 (Thread 0x7f4eb6c58700 (LWP 1658)):
#0  0x00007f4f824b7b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4f7dc4d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4eb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4eb6c57cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4f82bb1f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4ec11eb587 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x5eb3bf0) at thread/qthread_unix.cpp:368
#8  0x00007f4f81a5c6ba in start_thread (arg=0x7f4eb6c58700) at pthread_create.c:333
#9  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f4ec9081700 (LWP 1648)):
#0  0x00007f4f824b7b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4f7dc4d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4ebc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4ec9080d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4f82bb1f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x269b690) at thread/qthread_unix.cpp:368
#7  0x00007f4f81a5c6ba in start_thread (arg=0x7f4ec9081700) at pthread_create.c:333
#8  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4ec98c2700 (LWP 1647)):
#0  0x00007f4f82bae329 in std::__atomic_base<QMutexData*>::compare_exchange_strong (__m2=<optimized out>, __m1=std::memory_order_release, __p2=0x0, __p1=@0x7f4ec98c1a88: 0x1, this=0x275d010) at /usr/include/c++/5/bits/atomic_base.h:752
#1  std::atomic<QMutexData*>::compare_exchange_strong (__m=std::memory_order_release, __p2=0x0, __p1=@0x7f4ec98c1a88: 0x1, this=0x275d010) at /usr/include/c++/5/atomic:475
#2  QAtomicOps<QMutexData*>::testAndSetRelease<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_cxx11.h:299
#3  QBasicAtomicPointer<QMutexData>::testAndSetRelease (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=<optimized out>, this=0x275d010) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:261
#4  QBasicMutex::fastTryUnlock (current=<synthetic pointer>, this=0x275d010) at thread/qmutex.h:92
#5  QMutex::unlock (this=this@entry=0x275d010) at thread/qmutex.cpp:277
#6  0x00007f4f82dd6ec1 in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:147
#7  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:141
#8  QThreadData::canWaitLocked (this=0x275cfe0) at ../../include/QtCore/5.7.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:253
#9  postEventSourcePrepare (s=0x7f4ec40012d0, timeout=0x7f4ec98c1b14) at kernel/qeventdispatcher_glib.cpp:259
#10 0x00007f4f7dc4c91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f4f7dc4d2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4ec40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#14 0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4ec98c1ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#15 0x00007f4f82bb1f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#16 0x00007f4ec9d45975 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#17 0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x2b6b840) at thread/qthread_unix.cpp:368
#18 0x00007f4f81a5c6ba in start_thread (arg=0x7f4ec98c2700) at pthread_create.c:333
#19 0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f4ed328b700 (LWP 1597)):
#0  0x00007f4f824b7b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4f7dc4d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4ecc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4ed328ac90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4f82bb1f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4f85b69fc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x2b7bf20) at thread/qthread_unix.cpp:368
#8  0x00007f4f81a5c6ba in start_thread (arg=0x7f4ed328b700) at pthread_create.c:333
#9  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4f5ffff700 (LWP 1594)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4f875ce6f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f4f875ce739 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f4f81a5c6ba in start_thread (arg=0x7f4f5ffff700) at pthread_create.c:333
#4  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4f69f81700 (LWP 1593)):
#0  0x00007f4f7dc91a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4f7dc4c464 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d346 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4f580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4f69f80ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4f82bb1f64 in QThread::exec (this=this@entry=0x242b7d0) at thread/qthread.cpp:507
#7  0x00007f4f851e2bf5 in QQmlThreadPrivate::run (this=0x242b7d0) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x242b7d0) at thread/qthread_unix.cpp:368
#9  0x00007f4f81a5c6ba in start_thread (arg=0x7f4f69f81700) at pthread_create.c:333
#10 0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4f6bbf2700 (LWP 1576)):
#0  0x00007f4f824b7b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4f7dc4d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4f600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4f6bbf1ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4f82bb1f64 in QThread::exec (this=this@entry=0x242a1b0) at thread/qthread.cpp:507
#6  0x00007f4f851e2bf5 in QQmlThreadPrivate::run (this=0x242a1b0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x242a1b0) at thread/qthread_unix.cpp:368
#8  0x00007f4f81a5c6ba in start_thread (arg=0x7f4f6bbf2700) at pthread_create.c:333
#9  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4f717aa700 (LWP 1502)):
#0  0x00007f4f7dc4a494 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4f7dc4cd42 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f7dc4d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f7dc4d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4f82dd775b in QEventDispatcherGlib::processEvents (this=0x7f4f640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4f82d820ba in QEventLoop::exec (this=this@entry=0x7f4f717a9cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4f82bb1f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f4f87cb0735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x7f4f87d24d60) at thread/qthread_unix.cpp:368
#9  0x00007f4f81a5c6ba in start_thread (arg=0x7f4f717aa700) at pthread_create.c:333
#10 0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4f73036700 (LWP 1465)):
#0  0x00007f4f824b7b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4f8652fc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4f865318d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4f7517cd79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f4f82bb6b48 in QThreadPrivate::start (arg=0x23631f0) at thread/qthread_unix.cpp:368
#5  0x00007f4f81a5c6ba in start_thread (arg=0x7f4f73036700) at pthread_create.c:333
#6  0x00007f4f824c382d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4f87b738c0 (LWP 1459)):
[KCrash Handler]
#6  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=<error reading variable: Cannot access memory at address 0x30>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:141
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=<error reading variable: Cannot access memory at address 0x30>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:980
#8  QQmlEngine::d_func (this=<error reading variable: Cannot access memory at address 0x30>) at ../../include/QtQml/5.7.1/QtQml/private/../../../../../src/qml/qml/qqmlengine.h:158
#9  QQmlEnginePrivate::get (e=<error reading variable: Cannot access memory at address 0x30>) at ../../include/QtQml/5.7.1/QtQml/private/../../../../../src/qml/qml/qqmlengine_p.h:403
#10 QQmlIncubator::clear (this=this@entry=0x61e6db0) at qml/qqmlincubator.cpp:569
#11 0x00007f4f852052e8 in QQmlDelegateModelPrivate::releaseIncubator (this=this@entry=0x514dd20, incubationTask=0x61e6db0) at types/qqmldelegatemodel.cpp:846
#12 0x00007f4f85207afa in QQmlDelegateModelPrivate::itemsRemoved (this=this@entry=0x514dd20, removes=..., translatedRemoves=translatedRemoves@entry=0x7ffd238893a0, movedItems=movedItems@entry=0x0) at types/qqmldelegatemodel.cpp:1320
#13 0x00007f4f85207f12 in QQmlDelegateModelPrivate::itemsRemoved (this=this@entry=0x514dd20, removes=...) at types/qqmldelegatemodel.cpp:1357
#14 0x00007f4f85209638 in QQmlDelegateModel::_q_itemsRemoved (this=<optimized out>, index=0, count=48) at types/qqmldelegatemodel.cpp:1389
#15 0x00007f4f85209cc8 in QQmlDelegateModel::_q_rowsRemoved (this=<optimized out>, parent=..., begin=<optimized out>, end=<optimized out>) at types/qqmldelegatemodel.cpp:1539
#16 0x00007f4f8522d155 in QQmlDelegateModel::qt_static_metacall (_o=_o@entry=0x514db80, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=10, _a=_a@entry=0x7ffd238896b0) at .moc/moc_qqmldelegatemodel_p.cpp:196
#17 0x00007f4f8522d8e8 in QQmlDelegateModel::qt_metacall (this=0x514db80, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0x7ffd238896b0) at .moc/moc_qqmldelegatemodel_p.cpp:334
#18 0x00007f4f82daf014 in QMetaObject::activate (sender=sender@entry=0x50413f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffd238896b0) at kernel/qobject.cpp:3755
#19 0x00007f4f82daf837 in QMetaObject::activate (sender=sender@entry=0x50413f0, m=m@entry=0x7f4f82fc8d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffd238896b0) at kernel/qobject.cpp:3602
#20 0x00007f4f82e24d84 in QAbstractItemModel::rowsRemoved (this=this@entry=0x50413f0, _t1=..., _t2=0, _t3=47) at .moc/moc_qabstractitemmodel.cpp:615
#21 0x00007f4f82d2bdbb in QAbstractItemModel::endRemoveRows (this=this@entry=0x50413f0) at itemmodels/qabstractitemmodel.cpp:2715
#22 0x00007f4f85211bad in QQmlListModel::emitItemsRemoved (this=0x50413f0, index=0, count=48) at types/qqmllistmodel.cpp:1797
#23 0x00007f4f8522eafd in QQmlListModel::qt_static_metacall (_o=_o@entry=0x50413f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=1, _a=_a@entry=0x7ffd23889930) at .moc/moc_qqmllistmodel_p.cpp:123
#24 0x00007f4f8522ed68 in QQmlListModel::qt_metacall (this=0x50413f0, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffd23889930) at .moc/moc_qqmllistmodel_p.cpp:206
#25 0x00007f4f8519dd29 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffd23889c90, type=type@entry=QMetaObject::InvokeMetaMethod, index=index@entry=56, argv=argv@entry=0x7ffd23889930) at qml/qqmlpropertycache.cpp:1547
#26 0x00007f4f8512d52b in CallMethod (object=..., index=56, returnType=returnType@entry=43, argCount=argCount@entry=0, argTypes=argTypes@entry=0x0, engine=engine@entry=0x242b8c0, callArgs=0x7f4f68f82530) at jsruntime/qv4qobjectwrapper.cpp:1155
#27 0x00007f4f8512d9e7 in CallPrecise (object=..., data=..., engine=engine@entry=0x242b8c0, callArgs=callArgs@entry=0x7f4f68f82530) at jsruntime/qv4qobjectwrapper.cpp:1392
#28 0x00007f4f8512e365 in QV4::QObjectMethod::callInternal (this=<optimized out>, callData=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:1871
#29 0x00007f4f85144b31 in QV4::Object::call (d=0x7f4f68f82530, this=<optimized out>) at jsruntime/qv4object_p.h:332
#30 QV4::Runtime::callProperty (engine=0x242b8c0, nameIndex=<optimized out>, callData=0x7f4f68f82530) at jsruntime/qv4runtime.cpp:1030
#31 0x00007f4ec9d1e399 in ?? ()
#32 0x00007f4f68f82401 in ?? ()
#33 0x0003200000000000 in ?? ()
#34 0x00007f4f0000002b in ?? ()
#35 0x106a61153eae3400 in ?? ()
#36 0xfffffffe00030000 in ?? ()
#37 0x00007f4f58578980 in ?? ()
#38 0x000000000242b8c0 in ?? ()
#39 0x0000000000000000 in ?? ()

Possible duplicates by query: bug 380312, bug 379468, bug 378707, bug 378094, bug 375189.

Reported using DrKonqi