Application: plasma-discover (5.9.5)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.8.0-51-generic x86_64
Distribution: KDE neon User Edition 5.9

-- Information about the crash:
- What I was doing when the application crashed:
Was browsing Discover -> Applications -> Office. Was viewing about 1/3 of the way down the page (near the Freeplane app) when I pressed the down arrow on my keyboard to scroll down. After I pressed the down arrow key, the application crashed.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4e031ce8c0 (LWP 9500))]

Thread 9 (Thread 0x7f4d767fc700 (LWP 9542)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4dfff029fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x28d81b0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=this@entry=0x28555d8, mutex=mutex@entry=0x28555d0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f4e028b247d in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x28555c8) at scenegraph/qsgthreadedrenderloop.cpp:242
#4  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x2855550) at scenegraph/qsgthreadedrenderloop.cpp:690
#5  0x00007f4e028b2d55 in QSGRenderThread::run (this=0x2855550) at scenegraph/qsgthreadedrenderloop.cpp:719
#6  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x2855550) at thread/qthread_unix.cpp:368
#7  0x00007f4dfc98a6ba in start_thread (arg=0x7f4d767fc700) at pthread_create.c:333
#8  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4db67fc700 (LWP 9524)):
#0  0x00007f4dff4f9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa82e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e0012275b in QEventDispatcherGlib::processEvents (this=0x7f4da00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7f4db67fbd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4dffefcf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x26309f0) at thread/qthread_unix.cpp:368
#7  0x00007f4dfc98a6ba in start_thread (arg=0x7f4db67fc700) at pthread_create.c:333
#8  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f4dcf370700 (LWP 9517)):
#0  0x00007f4dff4f9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa82e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e0012275b in QEventDispatcherGlib::processEvents (this=0x7f4dc00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7f4dcf36fd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4dffefcf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x1c8e4a0) at thread/qthread_unix.cpp:368
#7  0x00007f4dfc98a6ba in start_thread (arg=0x7f4dcf370700) at pthread_create.c:333
#8  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4dcffff700 (LWP 9512)):
#0  0x00007f4dff4f569d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa8716f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82de74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4dfa82e330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4dfa82e712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4dd5bf89d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f4dfa854bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f4dfc98a6ba in start_thread (arg=0x7f4dcffff700) at pthread_create.c:333
#8  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4dd4c75700 (LWP 9511)):
#0  0x00007f4dff4f9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa82e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4dfa82e4d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4dfa854bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4dfc98a6ba in start_thread (arg=0x7f4dd4c75700) at pthread_create.c:333
#6  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4de37ff700 (LWP 9510)):
#0  0x00007f4dfa82d386 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4dfa82e245 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e0012275b in QEventDispatcherGlib::processEvents (this=0x7f4dd8002e00, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7f4de37fec90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4dffefcf64 in QThread::exec (this=this@entry=0x19ace20) at thread/qthread.cpp:507
#6  0x00007f4e02842fc6 in QQuickPixmapReader::run (this=0x19ace20) at util/qquickpixmapcache.cpp:822
#7  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x19ace20) at thread/qthread_unix.cpp:368
#8  0x00007f4dfc98a6ba in start_thread (arg=0x7f4de37ff700) at pthread_create.c:333
#9  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4de8ec9700 (LWP 9504)):
#0  0x00007f4dff4f9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa82e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e0012275b in QEventDispatcherGlib::processEvents (this=0x7f4ddc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7f4de8ec8ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4dffefcf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4e00873bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x168a8b0) at thread/qthread_unix.cpp:368
#8  0x00007f4dfc98a6ba in start_thread (arg=0x7f4de8ec9700) at pthread_create.c:333
#9  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4dea0da700 (LWP 9503)):
#0  0x00007f4dff4f9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4dfa82e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e0012275b in QEventDispatcherGlib::processEvents (this=0x7f4de40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7f4dea0d9cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4dffefcf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f4e0330e735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f4dfff01b48 in QThreadPrivate::start (arg=0x7f4e03382d60) at thread/qthread_unix.cpp:368
#8  0x00007f4dfc98a6ba in start_thread (arg=0x7f4dea0da700) at pthread_create.c:333
#9  0x00007f4dff50582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4e031ce8c0 (LWP 9500)):
[KCrash Handler]
#6  0x00007f4e028c4144 in QQuickItem::isVisible (this=this@entry=0xf567020) at items/qquickitem.cpp:5667
#7  0x00007f4e028c45a5 in QQuickKeysAttached::keyPressed (this=0x4ca5810, event=0x7fff4fb08fd0, post=<optimized out>) at items/qquickitem.cpp:1367
#8  0x00007f4e028cf863 in QQuickItemPrivate::deliverKeyEvent (this=0x2b1d730, e=0x7fff4fb08fd0) at items/qquickitem.cpp:4932
#9  0x00007f4e028cfaa1 in QQuickItem::event (this=0x2b1d700, ev=0x7fff4fb08fd0) at items/qquickitem.cpp:7614
#10 0x00007f4e01031ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2b1d700, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3799
#11 0x00007f4e010398c6 in QApplication::notify (this=0x7fff4fb093b0, receiver=0x2b1d700, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3556
#12 0x00007f4e000cf0c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x2b1d700, event=event@entry=0x7fff4fb08fd0) at kernel/qcoreapplication.cpp:988
#13 0x00007f4e028c45c1 in QCoreApplication::sendEvent (event=0x7fff4fb08fd0, receiver=0x2b1d700) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qcoreapplication.h:231
#14 QQuickKeysAttached::keyPressed (this=0x1731330, event=0x7fff4fb08fd0, post=<optimized out>) at items/qquickitem.cpp:1369
#15 0x00007f4e028cf863 in QQuickItemPrivate::deliverKeyEvent (this=0x172dad0, e=0x7fff4fb08fd0) at items/qquickitem.cpp:4932
#16 0x00007f4e028cfaa1 in QQuickItem::event (this=0x172daa0, ev=0x7fff4fb08fd0) at items/qquickitem.cpp:7614
#17 0x00007f4e01031ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x172daa0, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3799
#18 0x00007f4e010398c6 in QApplication::notify (this=0x7fff4fb093b0, receiver=0x172daa0, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3556
#19 0x00007f4e000cf0c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x172daa0, event=event@entry=0x7fff4fb08fd0) at kernel/qcoreapplication.cpp:988
#20 0x00007f4e028dffe2 in QCoreApplication::sendEvent (event=0x7fff4fb08fd0, receiver=0x172daa0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qcoreapplication.h:231
#21 QQuickWindow::sendEvent (this=<optimized out>, item=0x172daa0, e=e@entry=0x7fff4fb08fd0) at items/qquickwindow.cpp:2734
#22 0x00007f4e028e02bb in QQuickWindowPrivate::deliverKeyEvent (this=this@entry=0x171d9e0, e=e@entry=0x7fff4fb08fd0) at items/qquickwindow.cpp:1572
#23 0x00007f4e028e030f in QQuickWindow::keyPressEvent (this=<optimized out>, e=0x7fff4fb08fd0) at items/qquickwindow.cpp:1555
#24 0x00007f4e00aa2735 in QWindow::event (this=this@entry=0x171d990, ev=ev@entry=0x7fff4fb08fd0) at kernel/qwindow.cpp:2133
#25 0x00007f4e028e7f15 in QQuickWindow::event (this=0x171d990, e=0x7fff4fb08fd0) at items/qquickwindow.cpp:1546
#26 0x00007f4e01031ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x171d990, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3799
#27 0x00007f4e010398c6 in QApplication::notify (this=0x7fff4fb093b0, receiver=0x171d990, e=0x7fff4fb08fd0) at kernel/qapplication.cpp:3556
#28 0x00007f4e000cf0c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x171d990, event=event@entry=0x7fff4fb08fd0) at kernel/qcoreapplication.cpp:988
#29 0x00007f4e00a93088 in QCoreApplication::sendSpontaneousEvent (event=0x7fff4fb08fd0, receiver=0x171d990) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#30 QGuiApplicationPrivate::processKeyEvent (e=0xfd697d0) at kernel/qguiapplication.cpp:2016
#31 0x00007f4e00a98485 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0xfd697d0) at kernel/qguiapplication.cpp:1693
#32 0x00007f4e00a7632b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:659
#33 0x00007f4df5543270 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:76
#34 0x00007f4dfa82e197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f4dfa82e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f4dfa82e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f4e0012273f in QEventDispatcherGlib::processEvents (this=0x1644fe0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#38 0x00007f4e000cd0ba in QEventLoop::exec (this=this@entry=0x7fff4fb092d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#39 0x00007f4e000d56cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#40 0x00007f4e00a8e24c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1633
#41 0x00007f4e01031e25 in QApplication::exec () at kernel/qapplication.cpp:2975
#42 0x000000000040d601 in main (argc=1, argv=<optimized out>) at /workspace/build/discover/main.cpp:141

Possible duplicates by query: bug 379337.

Reported using DrKonqi