Bug 404509

Application: plasmashell (5.8.6)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.9.0-8-amd64 x86_64
Distribution: Debian GNU/Linux 9.8 (stretch)

-- Information about the crash:
- What I was doing when the application crashed:
Configuring plasmoids on a secondary display, primarily resizing & dragging them into place.

- Unusual behavior I noticed:
The position at which widgets are thrown to the other display is far too close to center in my opinion. I was wrestling with this when I experienced the crash. This is not the first time I've seen this happen but the other incidences were involving third-party widgets I assumed were the cause. Unable to readily reproduce but confident it will occur again.

The crash can be reproduced sometimes.

-- 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 0x7f51a4507480 (LWP 953))]

Thread 10 (Thread 0x7f50c17c5700 (LWP 1562)):
#0  0x00007f519ebd98bd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f519a5549f6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 9 (Thread 0x7f50c33a3700 (LWP 1541)):
#0  0x00007f519a554ae1 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f51a1b576a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#7  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 8 (Thread 0x7f50ccf50700 (LWP 1540)):
#0  0x00007f519ebd592d in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f519a598d40 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a5544be in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519a554994 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f51a1b576a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 7 (Thread 0x7f50ee2ff700 (LWP 1228)):
#0  0x00007f519ebd98bd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f519a5549f6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f51a24e1406 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 6 (Thread 0x7f517bfff700 (LWP 1149)):
#0  0x00007f519e3e217f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f51a3f592c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f51a3f59309 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 5 (Thread 0x7f5186390700 (LWP 1146)):
#0  0x00007f519ebd98bd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f519a5549f6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f51a1b576a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 4 (Thread 0x7f5187fff700 (LWP 1054)):
#0  0x00007f519ebd98bd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f519a5549f6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f51a1b576a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 3 (Thread 0x7f518dc17700 (LWP 985)):
#0  0x00007f519f4ec83b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f519a5543f9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f519a554994 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f519f4ed1eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f519f2c5093 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f51a46446e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7f518f412700 (LWP 971)):
#0  0x00007f519ebd98bd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f51a2eb0150 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f51a2eb1ee9 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5190d22b89 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f519f2c9d48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f519e3dc4a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f519ebe2d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f51a4507480 (LWP 953)):
[KCrash Handler]
#6  0x00007f51a25628c4 in QQuickItem::isEnabled() const () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f51a257fa6c in QQuickWindowPrivate::setFocusInScope(QQuickItem*, QQuickItem*, Qt::FocusReason, QFlags<QQuickWindowPrivate::FocusOption>) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f51a25646d8 in QQuickItem::setFocus(bool, Qt::FocusReason) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f51a25780e0 in QQuickWindow::focusInEvent(QFocusEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f519f7ee9db in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007f51a25861b5 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f519fd7db8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f519fd85351 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f519f498d30 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f519f7e43d9 in QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate::ActivatedWindowEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f519f7e475d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f519f7c260b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f5190d59360 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#19 0x00007f519a5547f7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f519a554a60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f519a554b0c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f519f4ed1cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f519f496d1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f519f49f46c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x0000563600fca06f in ?? ()
#26 0x00007f519eb1a2e1 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#27 0x0000563600fca3ea in _start ()

Possible duplicates by query: bug 378378.

Reported using DrKonqi