Bug 386347

Summary: Discover crashes in QCoreApplication::notifyInternal2() while searching
Product: [Applications] Discover Reporter: Robin van Es <rootje1978>
Component: discoverAssignee: Aleix Pol <aleixpol>
Status: RESOLVED UPSTREAM    
Severity: crash CC: cwb444, nate, stephen.p.ford
Priority: NOR Keywords: drkonqi
Version: 5.10.5   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
URL: https://bugreports.qt.io/browse/QTBUG-65881
See Also: https://bugs.kde.org/show_bug.cgi?id=378339
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Robin van Es 2017-10-30 08:15:48 UTC 
Application: plasma-discover (5.10.5)

Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.0-16-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
I was searching for the Chromium browser, when it showed the result I installed it but it kept on searching. The Chromium browser was installed but on the background something crashed with it.

-- Backtrace:
Application: Ontdekken (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9488f43d40 (LWP 5346))]

Thread 11 (Thread 0x7f943b5d5700 (LWP 5414)):
#0  0x00007f947eff5799 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f947eff609b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9480ee77fc in start_thread (arg=0x7f943b5d5700) at pthread_create.c:465
#8  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f943bdd6700 (LWP 5413)):
#0  0x00007f9484672901 in __GI___poll (fds=0x7f94300028f0, nfds=2, timeout=84810) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f947eff6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9480ee77fc in start_thread (arg=0x7f943bdd6700) at pthread_create.c:465
#8  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f9441f06700 (LWP 5359)):
#0  0x00007f9484673ea7 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f945f5db32c in  () at /usr/lib/nvidia-384/libnvidia-glcore.so.384.90
#2  0x00007f945f5dc307 in  () at /usr/lib/nvidia-384/libnvidia-glcore.so.384.90
#3  0x00007f945f5dcca3 in  () at /usr/lib/nvidia-384/libnvidia-glcore.so.384.90
#4  0x00007f9464be0392 in  () at /usr/lib/nvidia-384/libGLX_nvidia.so.0
#5  0x00007f945f2dfa60 in  () at /usr/lib/nvidia-384/libnvidia-glcore.so.384.90
#6  0x00007f945f20528e in  () at /usr/lib/nvidia-384/libnvidia-glcore.so.384.90
#7  0x00007f9464bd6eae in  () at /usr/lib/nvidia-384/libGLX_nvidia.so.0
#8  0x00007f94757bc7d2 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#9  0x00007f9485dd692a in QOpenGLContext::swapBuffers(QSurface*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f948827c043 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f9488280f08 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f9480ee77fc in start_thread (arg=0x7f9441f06700) at pthread_create.c:465
#14 0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f9442707700 (LWP 5356)):
#0  0x00007f947f03b5b9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f947eff612e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9480ee77fc in start_thread (arg=0x7f9442707700) at pthread_create.c:465
#8  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f9451f25700 (LWP 5353)):
#0  0x00007ffc05fc1980 in  ()
#1  0x00007ffc05fc1c30 in clock_gettime ()
#2  0x00007f948468d946 in __GI___clock_gettime (clock_id=1, tp=0x7f9451f24a60) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007f9484fb1db1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484fb05e9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484fb0bc5 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9484fb220e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f947eff56a8 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f947eff609b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f9480ee77fc in start_thread (arg=0x7f9451f25700) at pthread_create.c:465
#15 0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f9453471700 (LWP 5352)):
#0  0x00007f947eff5157 in g_main_context_release () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f947eff6126 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9480ee77fc in start_thread (arg=0x7f9453471700) at pthread_create.c:465
#8  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f945d1d0700 (LWP 5351)):
#0  0x00007f947eff5a76 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f947eff6110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9488201846 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9480ee77fc in start_thread (arg=0x7f945d1d0700) at pthread_create.c:465
#9  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f9467fff700 (LWP 5350)):
#0  0x00007f9484672901 in __GI___poll (fds=0x7f94600029e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f947eff6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9485982f45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9480ee77fc in start_thread (arg=0x7f9467fff700) at pthread_create.c:465
#9  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f946d846700 (LWP 5349)):
#0  0x00007f9484672901 in __GI___poll (fds=0x7f9468018f70, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f947eff6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9484fb249b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9484d773ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9487106e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9480ee77fc in start_thread (arg=0x7f946d846700) at pthread_create.c:465
#9  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f94767de700 (LWP 5348)):
#0  0x00007f9484672901 in __GI___poll (fds=0x7f94767ddbf8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f947ed8f747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f947ed9153a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f947936cf09 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f9484d7c29d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9480ee77fc in start_thread (arg=0x7f94767de700) at pthread_create.c:465
#6  0x00007f948467eb0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f9488f43d40 (LWP 5346)):
[KCrash Handler]
#6  0x00007f9484f59d50 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f94882b5265 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f94882c0f3a in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f94882c12c5 in QQuickItem::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f948655846c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f948655fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f9484f59de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f94882b5265 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f94882c0f3a in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f94882c12c5 in QQuickItem::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f948655846c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f948655fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f9484f59de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f94882b5265 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f94882c0f3a in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f94882c12c5 in QQuickItem::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f948655846c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f948655fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f9484f59de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f94882b5265 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#26 0x00007f94882c0f3a in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#27 0x00007f94882c12c5 in QQuickItem::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#28 0x00007f948655846c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f948655fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f9484f59de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f94882d25a8 in QQuickWindow::sendEvent(QQuickItem*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#32 0x00007f94882d28bf in QQuickWindow::keyReleaseEvent(QKeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#33 0x00007f9485da8d35 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#34 0x00007f94882d9d05 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#35 0x00007f948655846c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f948655fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007f9484f59de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f9485d99ab0 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#39 0x00007f9485d9ea05 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#40 0x00007f9485d76cab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#41 0x00007f94793cf5a0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007f947eff5fb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007f947eff61f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007f947eff627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f9484fb247f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007f9484f57e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f9484f60da4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00005630c5ebafa8 in  ()
#49 0x00007f948458b1c1 in __libc_start_main (main=0x5630c5eba6d0, argc=1, argv=0x7ffc05f9c4e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc05f9c4d8) at ../csu/libc-start.c:308
#50 0x00005630c5ebb22a in _start ()

Reported using DrKonqi
Comment 1 Nate Graham 2017-11-07 20:23:14 UTC 
*** Bug 386622 has been marked as a duplicate of this bug. ***
Comment 2 Nate Graham 2017-11-16 16:59:03 UTC 
*** Bug 386974 has been marked as a duplicate of this bug. ***
Comment 3 Nate Graham 2017-12-12 04:10:23 UTC 
I can reproduce this one fairly frequently when I repeatedly search for things, click on them, and start a new search.
Comment 4 Nate Graham 2018-01-18 17:16:03 UTC 
Also QQuickItemPrivate::deliverKeyEvent(), just like Bug 378339. Shall we mark it as a duplicate?
Comment 5 Nate Graham 2018-01-20 15:34:09 UTC 
Yup. This is caused by a Qt bug: https://bugreports.qt.io/browse/QTBUG-65881, which should be resolved by https://codereview.qt-project.org/#/c/217395, once that lands.