Application: plasmashell (5.4.2)

Qt Version: 5.5.0
Operating System: Linux 4.1.12-1-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed:
Trying to add a widget to the desktop

- Unusual behavior I noticed:
Plasmashell (and Dolphin) segmentation faults are very frequent on my system

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efcff2287c0 (LWP 3200))]

Thread 9 (Thread 0x7efce8cef700 (LWP 3205)):
#0  0x00007efcf879cc1d in poll () at /lib64/libc.so.6
#1  0x00007efcfd6a2422 in  () at /usr/lib64/libxcb.so.1
#2  0x00007efcfd6a400f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007efceae3fc29 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7efce2000700 (LWP 3207)):
#0  0x00007efcf8798ced in read () at /lib64/libc.so.6
#1  0x00007efcf4eceb60 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007efcf4e8d999 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007efcf4e8ddf8 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007efcf4e8df7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007efcf90c4a5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007efcf906ba63 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007efcf8e8e84a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007efcfc15e5f8 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7efcd4424700 (LWP 3215)):
#0  0x00007efcf7faa05f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007efcdaea5e53 in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007efcdaea55d7 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7efcce754700 (LWP 3216)):
#0  0x00007efcf879cc1d in poll () at /lib64/libc.so.6
#1  0x00007efcf4e8de64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007efcf4e8df7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007efcf90c4a5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007efcf906ba63 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007efcf8e8e84a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007efcfc15e5f8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7efcccc76700 (LWP 3219)):
#0  0x00007efcf879cc1d in poll () at /lib64/libc.so.6
#1  0x00007efcf4e8de64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007efcf4e8df7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007efcf90c4a5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007efcf906ba63 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007efcf8e8e84a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007efcfc15e5f8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7efcc71c3700 (LWP 3220)):
#0  0x00007efcf7faa05f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007efcfe9067eb in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007efcfe906819 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7efc3f92d700 (LWP 3221)):
#0  0x00007efcf4ecfd14 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007efcf4e8d4a0 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007efcf4e8dd80 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007efcf4e8df7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007efcf90c4a5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007efcf906ba63 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007efcf8e8e84a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007efcfcceaf82 in  () at /usr/lib64/libQt5Quick.so.5
#8  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7efc2f2dc700 (LWP 3223)):
#0  0x00007efcf879cc1d in poll () at /lib64/libc.so.6
#1  0x00007efcf4e8de64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007efcf4e8df7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007efcf90c4a5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007efcf906ba63 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007efcf8e8e84a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007efc309a9cf7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#7  0x00007efcf8e9355f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007efcf7fa60a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007efcf87a504d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7efcff2287c0 (LWP 3200)):
[KCrash Handler]
#6  0x00007efcf8f24518 in operator==(QString const&, QString const&) () at /usr/lib64/libQt5Core.so.5
#7  0x00007efcf90fdddd in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007efcf90f0df8 in QMimeType::comment() const () at /usr/lib64/libQt5Core.so.5
#9  0x00007efcf26accd8 in KFileItem::mimeComment() const () at /usr/lib64/libKF5KIOCore.so.5
#10 0x00007efcf6c39d9d in KDirModel::data(QModelIndex const&, int) const () at /usr/lib64/libKF5KIOWidgets.so.5
#11 0x00007efcc55257fd in  () at /usr/lib64/qt5/qml/org/kde/private/desktopcontainment/folder/libfolderplugin.so
#12 0x00007efcc55332f4 in  () at /usr/lib64/qt5/qml/org/kde/private/desktopcontainment/folder/libfolderplugin.so
#13 0x00007efcfbf2ce73 in  () at /usr/lib64/libQt5Qml.so.5
#14 0x00007efcfbf2c357 in  () at /usr/lib64/libQt5Qml.so.5
#15 0x00007efcfc09f17c in  () at /usr/lib64/libQt5Qml.so.5
#16 0x00007efcfc09fa63 in QV4::QObjectWrapper::getProperty(QObject*, QV4::ExecutionContext*, QQmlPropertyData*, bool) () at /usr/lib64/libQt5Qml.so.5
#17 0x00007efcfc0a0649 in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) () at /usr/lib64/libQt5Qml.so.5
#18 0x00007efcfc0b58a6 in QV4::Runtime::getProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () at /usr/lib64/libQt5Qml.so.5
#19 0x00007efcc499c87c in  ()
#20 0x00007fff059baa30 in  ()
#21 0x00007efcf8afc318 in operator new(unsigned long) () at /usr/lib64/libstdc++.so.6
#22 0x00007efcfc14f537 in  () at /usr/lib64/libQt5Qml.so.5
#23 0x0000000000000000 in  ()

Reported using DrKonqi