Application: plasmashell (5.12.7)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-43-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

There were two saved wifi networks that I could connect. I was already connected to one of them. Then I decided to change the network that I'm connected. I clicked the wifi symbol on the tray, clicked 'Connect' button of a different wifi entry. 

- Unusual behavior I noticed:

The bottom panel (the only panel I have, I don't know its name, it's like the panel of the Windows) disappeared and bug report software opened automatically. Then the panel reappeared.

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 0x7f07cb771800 (LWP 2964))]

Thread 13 (Thread 0x7f06d261c700 (LWP 5563)):
[KCrash Handler]
#6  0x00007f07c91a9640 in QSGSimpleTextureNode::texture() const () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f071320f963 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kquickcontrolsaddons/libkquickcontrolsaddonsplugin.so
#8  0x00007f07c56626cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f07c922ba30 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f07c91d6bbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f07c91dbac8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f07c45d66db in start_thread (arg=0x7f06d261c700) at pthread_create.c:463
#14 0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f0711b2d700 (LWP 4006)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a705d094) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a705d040, cond=0x5566a705d068) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a705d068, mutex=0x5566a705d040) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91db6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91dbb0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c45d66db in start_thread (arg=0x7f0711b2d700) at pthread_create.c:463
#8  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f06e29fe700 (LWP 3838)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a6c8be10) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a6c8bdc0, cond=0x5566a6c8bde8) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a6c8bde8, mutex=0x5566a6c8bdc0) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91db6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91dbb0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c45d66db in start_thread (arg=0x7f06e29fe700) at pthread_create.c:463
#8  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f06e33ff700 (LWP 3831)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a6752b00) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a6752ab0, cond=0x5566a6752ad8) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a6752ad8, mutex=0x5566a6752ab0) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91db6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91dbb0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c45d66db in start_thread (arg=0x7f06e33ff700) at pthread_create.c:463
#8  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f06eef4c700 (LWP 3721)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a6722ca0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a6722c50, cond=0x5566a6722c78) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a6722c78, mutex=0x5566a6722c50) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91db6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91dbb0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c45d66db in start_thread (arg=0x7f06eef4c700) at pthread_create.c:463
#8  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f06f6a22700 (LWP 3676)):
#0  0x00007f07bf8f3049 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f07bf8ad440 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f07bf8ad64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f07c568c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c56319ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c545022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f06f937e747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07c45d66db in start_thread (arg=0x7f06f6a22700) at pthread_create.c:463
#9  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f071093c700 (LWP 3617)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a48a7620) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a48a75d0, cond=0x5566a48a75f8) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a48a75f8, mutex=0x5566a48a75d0) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91db6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91dbb0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c45d66db in start_thread (arg=0x7f071093c700) at pthread_create.c:463
#8  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f07a4f35700 (LWP 3589)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f07cb131fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f07cb131f68, cond=0x7f07cb131f90) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x7f07cb131f90, mutex=0x7f07cb131f68) at pthread_cond_wait.c:655
#3  0x00007f07cae3b5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f07cae3b639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f07c45d66db in start_thread (arg=0x7f07a4f35700) at pthread_create.c:463
#6  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f07a6d8b700 (LWP 3577)):
#0  0x00007f07c4d3f0b4 in __GI___libc_read (fd=11, buf=0x7f07a6d8ab70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f07bf8f1cd0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f07bf8ad027 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f07bf8ad4e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f07bf8ad64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f07c568c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c56319ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c545022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07c85c26f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f07c45d66db in start_thread (arg=0x7f07a6d8b700) at pthread_create.c:463
#11 0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f07ad273700 (LWP 3005)):
#0  0x00007f07c5425490 in g_main_context_iteration@plt () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f07c568c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f07c56319ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f07c545022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c85c26f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c45d66db in start_thread (arg=0x7f07ad273700) at pthread_create.c:463
#7  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f07aecb8700 (LWP 2976)):
#0  0x00007f07c4d43bf9 in __GI___poll (fds=0x7f07a8004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f07bf8ad539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f07bf8ad64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f07c568c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c56319ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c545022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c5b09d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07c45d66db in start_thread (arg=0x7f07aecb8700) at pthread_create.c:463
#9  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f07b5374700 (LWP 2974)):
#0  0x00007f07c4d43bf9 in __GI___poll (fds=0x7f07b5373ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f07c9d68747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f07c9d6a36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f07b7d0d2a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f07c545516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c45d66db in start_thread (arg=0x7f07b5374700) at pthread_create.c:463
#6  0x00007f07c4d5088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f07cb771800 (LWP 2964)):
#0  0x00007f07c45dc9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5566a52df170) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f07c45dc9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5566a52df120, cond=0x5566a52df148) at pthread_cond_wait.c:502
#2  0x00007f07c45dc9f3 in __pthread_cond_wait (cond=0x5566a52df148, mutex=0x5566a52df120) at pthread_cond_wait.c:655
#3  0x00007f07c545659b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f07c91d7e7d in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f07c91d8c52 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f07c9235726 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f07cb16f323 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#8  0x00007f07c663b82c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f07c66430f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f07c56339a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f07c5e8b141 in QWindowPrivate::deliverUpdateRequest() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f07c5e8b659 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f07c92356c5 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f07cb16f323 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#15 0x00007f07c663b82c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f07c66430f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f07c56339a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f07c568bd8e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f07c568c551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f07bf8ad387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f07bf8ad5c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f07bf8ad64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f07c568c8ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f07c56319ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f07c563aa84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00005566a215dcfa in  ()
#27 0x00007f07c4c50b97 in __libc_start_main (main=0x5566a215d320, argc=1, argv=0x7ffd12b10108, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd12b100f8) at ../csu/libc-start.c:310
#28 0x00005566a215e09a in _start ()

Reported using DrKonqi