Application: plasmashell (5.8.6)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.9.0-3-amd64 x86_64
Distribution: Debian GNU/Linux 9.1 (stretch)

-- Information about the crash:
I left my computer turn on the screen saver. The computer was locked when I came back (as expected). when I turned off the screen lock, plasma had crashed.

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 0x7ffa397cfd80 (LWP 3018))]

Thread 12 (Thread 0x7ff942bfe700 (LWP 4648)):
#0  0x00007ffa336bb15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffa345a3c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffa37828405 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007ffa37828cfa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa336b5494 in start_thread (arg=0x7ff942bfe700) at pthread_create.c:333
#6  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 11 (Thread 0x7ff943bff700 (LWP 4647)):
#0  0x00007ffa3459a2a9 in QMutex::unlock() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007ffa347c67f1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffa2f7faedd in g_main_context_prepare (context=context@entry=0x7ff93c000990, priority=priority@entry=0x7ff943bfeb60) at ././glib/gmain.c:3501
#3  0x00007ffa2f7fb91b in g_main_context_iterate (context=context@entry=0x7ff93c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#4  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ff93c000990, may_block=1) at ././glib/gmain.c:3990
#5  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffa36e2f6a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffa336b5494 in start_thread (arg=0x7ff943bff700) at pthread_create.c:333
#11 0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 10 (Thread 0x7ff95d4fd700 (LWP 27214)):
#0  0x00007ffa336bb15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffa345a3c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffa37828405 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007ffa37828cfa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa336b5494 in start_thread (arg=0x7ff95d4fd700) at pthread_create.c:333
#6  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 9 (Thread 0x7ff95edee700 (LWP 3447)):
#0  0x00007ffa336bb15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffa345a3c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffa37828405 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007ffa37828cfa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa336b5494 in start_thread (arg=0x7ff95edee700) at pthread_create.c:333
#6  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 8 (Thread 0x7ff982af6700 (LWP 3330)):
#0  0x00007ffa347c67a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007ffa2f7faedd in g_main_context_prepare (context=context@entry=0x7ff97c000990, priority=priority@entry=0x7ff982af5b10) at ././glib/gmain.c:3501
#2  0x00007ffa2f7fb91b in g_main_context_iterate (context=context@entry=0x7ff97c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ff97c000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa377b9406 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffa336b5494 in start_thread (arg=0x7ff982af6700) at pthread_create.c:333
#10 0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 7 (Thread 0x7ffa15307700 (LWP 3207)):
#0  0x00007ffa336bb15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffa392312c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007ffa39231309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007ffa336b5494 in start_thread (arg=0x7ffa15307700) at pthread_create.c:333
#4  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 6 (Thread 0x7ffa16141700 (LWP 3142)):
#0  0x00007ffa33eb26ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffa2f7fb9f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7ffa04003070, timeout=<optimized out>, context=0x7ffa04000990) at ././glib/gmain.c:4228
#2  0x00007ffa2f7fb9f6 in g_main_context_iterate (context=context@entry=0x7ffa04000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ffa04000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffa336b5494 in start_thread (arg=0x7ffa16141700) at pthread_create.c:333
#9  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 5 (Thread 0x7ffa17fff700 (LWP 3129)):
#0  0x00007ffa33eae71d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffa2f83fd40 in read (__nbytes=16, __buf=0x7ffa17ffea80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007ffa2f83fd40 in g_wakeup_acknowledge (wakeup=0x7ffa10002390) at ././glib/gwakeup.c:210
#3  0x00007ffa2f7fb4be in g_main_context_check (context=context@entry=0x7ffa0c000990, max_priority=2147483647, fds=fds@entry=0x7ffa0c003070, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007ffa2f7fb994 in g_main_context_iterate (context=context@entry=0x7ffa0c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ffa0c000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffa36e2f6a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007ffa336b5494 in start_thread (arg=0x7ffa17fff700) at pthread_create.c:333
#12 0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 4 (Thread 0x7ffa1e36b700 (LWP 3060)):
#0  0x00007ffa33eb26ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffa2f7fb9f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7ffa10002e70, timeout=<optimized out>, context=0x7ffa10000990) at ././glib/gmain.c:4228
#2  0x00007ffa2f7fb9f6 in g_main_context_iterate (context=context@entry=0x7ffa10000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ffa10000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa36e2f6a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffa336b5494 in start_thread (arg=0x7ffa1e36b700) at pthread_create.c:333
#10 0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 3 (Thread 0x7ffa1fdb0700 (LWP 3039)):
#0  0x00007ffa33eb26ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffa2f7fb9f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7ffa18012ea0, timeout=<optimized out>, context=0x7ffa18000990) at ././glib/gmain.c:4228
#2  0x00007ffa2f7fb9f6 in g_main_context_iterate (context=context@entry=0x7ffa18000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ffa18000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007ffa347c706b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffa3459e0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffa3990b6d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffa336b5494 in start_thread (arg=0x7ffa1fdb0700) at pthread_create.c:333
#10 0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 2 (Thread 0x7ffa25622700 (LWP 3032)):
#0  0x00007ffa33eb26ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffa38188150 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007ffa38189ee9 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007ffa27363b69 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007ffa345a2da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffa336b5494 in start_thread (arg=0x7ffa25622700) at pthread_create.c:333
#6  0x00007ffa33ebbaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 1 (Thread 0x7ffa397cfd80 (LWP 3018)):
[KCrash Handler]
#6  0x00007ffa34ac00f0 in QWindow::screen() const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00005625713b3724 in  ()
#8  0x00007ffa3479e95e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffa34ab0952 in QGuiApplication::primaryScreenChanged(QScreen*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007ffa2736379d in QXcbConnection::createScreen(QXcbVirtualDesktop*, xcb_randr_output_change_t const&, xcb_randr_get_output_info_reply_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#11 0x00007ffa27365237 in QXcbConnection::updateScreens(xcb_randr_notify_event_t const*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#12 0x00007ffa27365b93 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#13 0x00007ffa27366015 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#14 0x00007ffa3479f499 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007ffa35055b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007ffa3505d341 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007ffa347729e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007ffa3477516d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ffa347c6c43 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007ffa2f7fb7f7 in g_main_dispatch (context=0x7ffa200016f0) at ././glib/gmain.c:3203
#21 0x00007ffa2f7fb7f7 in g_main_context_dispatch (context=context@entry=0x7ffa200016f0) at ././glib/gmain.c:3856
#22 0x00007ffa2f7fba60 in g_main_context_iterate (context=context@entry=0x7ffa200016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#23 0x00007ffa2f7fbb0c in g_main_context_iteration (context=0x7ffa200016f0, may_block=1) at ././glib/gmain.c:3990
#24 0x00007ffa347c704f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007ffa347709ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007ffa3477913c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000056257139106f in  ()
#28 0x00007ffa33df32b1 in __libc_start_main (main=0x562571390510, argc=2, argv=0x7ffd65ff7c98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd65ff7c88) at ../csu/libc-start.c:291
#29 0x00005625713913ea in _start ()

Reported using DrKonqi