Bug 377052

Summary:	Discover crashed while scrolling through applications using keyboard
Product:	[Applications] Discover	Reporter:	Antonio Cardace <ichigo663>
Component:	discover	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	admin
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	5.9.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Antonio Cardace 2017-03-01 09:22:32 UTC

Application: plasma-discover (5.9.3)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.11-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
I was scrolling through the installable appllications using the arrow keys.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fdcb0dd5800 (LWP 9593))]

Thread 9 (Thread 0x7fdc2172d700 (LWP 9620)):
#0  0x00007fdcac2c948d in poll () at /usr/lib/libc.so.6
#1  0x00007fdca6f047a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f04b32 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc232e4446 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007fdca6f2c175 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fdc21f2e700 (LWP 9619)):
#0  0x00007fdcac2c948d in poll () at /usr/lib/libc.so.6
#1  0x00007fdca6f047a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdca6f04901 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fdca6f2c175 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fdc663f2700 (LWP 9607)):
#0  0x00007fdca6f03efc in g_main_context_query () at /usr/lib/libglib-2.0.so.0
#1  0x00007fdca6f04718 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdcacef106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdcaccbca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fdc7f959700 (LWP 9598)):
#0  0x00007fdcac2c948d in poll () at /usr/lib/libc.so.6
#1  0x00007fdca6f047a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdcacef106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdcaccbca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fdc86d42700 (LWP 9597)):
#0  0x00007fdcac2c948d in poll () at /usr/lib/libc.so.6
#1  0x00007fdca6f047a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdcacef106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdcaccbca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdcb0128fd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fdc8f5ef700 (LWP 9596)):
#0  0x00007fdca6f49e49 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fdca6f04762 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdcacef106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdcaccbca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdcad868025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fdc94f70700 (LWP 9595)):
#0  0x00007fdcac2c54ed in read () at /usr/lib/libc.so.6
#1  0x00007fdca6f48aa0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdca6f0426e in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdca6f04744 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fdcacef106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fdcaccbca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fdcaeb3a125 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fdc9d3c3700 (LWP 9594)):
#0  0x00007fdcac2c948d in poll () at /usr/lib/libc.so.6
#1  0x00007fdca6c9d8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fdca6c9f679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fdc9f927239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fdcaccc16d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fdca8e25454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fdcac2d27df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fdcb0dd5800 (LWP 9593)):
[KCrash Handler]
#6  0x00007fdcb01cb734 in QQuickItem::isVisible() const () at /usr/lib/libQt5Quick.so.5
#7  0x00007fdcb01cbb61 in  () at /usr/lib/libQt5Quick.so.5
#8  0x00007fdcb01d5c53 in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#9  0x00007fdcb01d5e91 in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#10 0x00007fdcae41d34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007fdcae424b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fdcace9c440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fdcb01cbb7d in  () at /usr/lib/libQt5Quick.so.5
#14 0x00007fdcb01d5c53 in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#15 0x00007fdcb01d5e91 in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#16 0x00007fdcae41d34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007fdcae424b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007fdcace9c440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#19 0x00007fdcb01e65ad in QQuickWindow::sendEvent(QQuickItem*, QEvent*) () at /usr/lib/libQt5Quick.so.5
#20 0x00007fdcb01e675f in QQuickWindow::keyPressEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#21 0x00007fdcadc94d05 in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#22 0x00007fdcb01ee4a5 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#23 0x00007fdcae41d34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007fdcae424b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007fdcace9c440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007fdcadc854b8 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () at /usr/lib/libQt5Gui.so.5
#27 0x00007fdcadc8a8a5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#28 0x00007fdcadc6644b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#29 0x00007fdc9f9879e0 in  () at /usr/lib/libQt5XcbQpa.so.5
#30 0x00007fdca6f045a7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#31 0x00007fdca6f04810 in  () at /usr/lib/libglib-2.0.so.0
#32 0x00007fdca6f048bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#33 0x00007fdcacef104f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#34 0x00007fdcace9a89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007fdcacea2de4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#36 0x000000000040d5d9 in  ()
#37 0x00007fdcac20a291 in __libc_start_main () at /usr/lib/libc.so.6
#38 0x000000000040db5a in _start ()

Reported using DrKonqi

Comment 1 Dan Leinir Turthra Jensen 2017-04-18 11:13:32 UTC

It has been a bit of work to confirm this, but while this bug is triggered differently, the root cause is the same as in the bug of which i am marking this as a duplicate. Thank you for the report! It helped me dig it out :)

*** This bug has been marked as a duplicate of bug 378339 ***