Application: plasmashell (5.9.3)

Qt Version: 5.8.0
Frameworks Version: 5.32.0
Operating System: Linux 4.10.2-1-zen x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
打开桌面设置后连续两次更改桌面布局（从“桌面”改为“文件夹视图”，应用后再改回“桌面”并应用），点击确定后回到桌面，点击桌面左上角按钮（三条横杠）导致桌面崩溃。
- Custom settings of the application:
桌面扩展“红移（redshift）”
自定义的壁纸

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4211a7e800 (LWP 1238))]

Thread 8 (Thread 0x7f4143fbb700 (LWP 1572)):
#0  0x00007f420a6fbcbf in pthread_getspecific () at /usr/lib/libpthread.so.0
#1  0x00007f4205f56670 in g_thread_self () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4205f2d65c in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4205f2e655 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4205f2e8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f420ba6f06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f420ba1889a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f420b83aa73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f41469570a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#9  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f4157514700 (LWP 1383)):
#0  0x00007f420b14867d in poll () at /usr/lib/libc.so.6
#1  0x00007f4205f2e7a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4205f2e8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f420ba6f06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f420ba1889a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f420b83aa73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f420f525fd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f41e7de9700 (LWP 1377)):
#0  0x00007f420a6fa756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f4211219234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f4211219279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f41f1d1d700 (LWP 1376)):
#0  0x00007f420b14867d in poll () at /usr/lib/libc.so.6
#1  0x00007f4205f2e7a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4205f2e8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f420ba6f06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f420ba1889a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f420b83aa73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f420e972025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f41f3dfa700 (LWP 1314)):
#0  0x00007f420b14867d in poll () at /usr/lib/libc.so.6
#1  0x00007f4205f2e7a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4205f2e8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f420ba6f06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f420ba1889a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f420b83aa73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f420e972025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f41f9d0d700 (LWP 1263)):
#0  0x00007f420b14867d in poll () at /usr/lib/libc.so.6
#1  0x00007f4205f2e7a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4205f2e8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f420ba6f06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f420ba1889a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f420b83aa73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f420be84125 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f41fbb15700 (LWP 1258)):
#0  0x00007f420b14867d in poll () at /usr/lib/libc.so.6
#1  0x00007f421013f8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f4210141679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f41fe087239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f420b83f6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f420a6f42e7 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f420b15254f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f4211a7e800 (LWP 1238)):
[KCrash Handler]
#6  0x00007f420e8dddd2 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f420e8d4d9e in QQmlEnginePrivate::typeCategory(int) const () at /usr/lib/libQt5Qml.so.5
#8  0x00007f420e923432 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007f420e923973 in QQmlPropertyCache::resolve(QQmlPropertyData*) const () at /usr/lib/libQt5Qml.so.5
#10 0x00007f420e923b61 in QQmlPropertyCache::findProperty(QStringHash<QPair<int, QQmlPropertyData*> >::ConstIterator, QQmlVMEMetaObject const*, QQmlContextData*) const () at /usr/lib/libQt5Qml.so.5
#11 0x00007f420e8a6fe2 in QV4::QObjectWrapper::findProperty(QV4::ExecutionEngine*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QQmlPropertyData*) const () at /usr/lib/libQt5Qml.so.5
#12 0x00007f420e8aad73 in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) const () at /usr/lib/libQt5Qml.so.5
#13 0x00007f420e8c08ff in QV4::Runtime::method_getProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () at /usr/lib/libQt5Qml.so.5
#14 0x00007f41e720b787 in  ()
#15 0x00007f41e72079c0 in  ()
#16 0x00007f420e95413a in  () at /usr/lib/libQt5Qml.so.5
#17 0x00007f420e857f93 in  () at /usr/lib/libQt5Qml.so.5
#18 0x00007f420e952aba in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*, QV4::Scope&) () at /usr/lib/libQt5Qml.so.5
#19 0x00007f420e95c86b in  () at /usr/lib/libQt5Qml.so.5
#20 0x00007f420e959ae9 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#21 0x00007f420e96607e in  () at /usr/lib/libQt5Qml.so.5
#22 0x00007f420e8ebab2 in  () at /usr/lib/libQt5Qml.so.5
#23 0x00007f420e8ec33e in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /usr/lib/libQt5Qml.so.5
#24 0x00007f420e8e7596 in QQmlComponent::create(QQmlIncubator&, QQmlContext*, QQmlContext*) () at /usr/lib/libQt5Qml.so.5
#25 0x00007f420f66356f in  () at /usr/lib/libQt5Quick.so.5
#26 0x00007f420f663718 in  () at /usr/lib/libQt5Quick.so.5
#27 0x00007f420f663d85 in  () at /usr/lib/libQt5Quick.so.5
#28 0x00007f420f6643a0 in  () at /usr/lib/libQt5Quick.so.5
#29 0x00007f420f66450b in  () at /usr/lib/libQt5Quick.so.5
#30 0x00007f420e8e5ac9 in  () at /usr/lib/libQt5Qml.so.5
#31 0x00007f420e8e4498 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#32 0x00007f420e8aeb7b in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#33 0x00007f420e8af390 in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#34 0x00007f420e8af4a6 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#35 0x00007f420e8bff56 in QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#36 0x00007f41e7202e53 in  ()
#37 0x00000000012895a0 in  ()
#38 0x00007f41e7203504 in  ()
#39 0x00007ffc85b98ad0 in  ()
#40 0x0003400000000001 in  ()
#41 0x00000000000004fc in  ()
#42 0x0003400000000000 in  ()
#43 0x00007ffc85b98b30 in  ()
#44 0x0000000000000000 in  ()

Reported using DrKonqi