Bug 419427

Summary:	Plasma Wayland crashed when connecting to a new wireless network
Product:	[Plasma] plasmashell	Reporter:	Jack Todaro <jack.t>
Component:	general	Assignee:	David Edmundson <kde>
Status:	RESOLVED FIXED
Severity:	crash	CC:	nate, plasma-bugs-null
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	5.18.3
Target Milestone:	1.0
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Jack Todaro 2020-03-30 19:15:17 UTC

Application: plasmashell (5.18.3)

Qt Version: 5.14.1
Frameworks Version: 5.68.0
Operating System: Linux 5.5.13-gentoo x86_64
Windowing system: Wayland
Distribution: Gentoo/Linux

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

I had just logged into a Plasma Wayland session, as usual.

I finished connecting to a new wireless network using the NetworkManager plasma applet.
Shortly after, the screen went black for a few seconds, until the elements of the desktop progressively
returned within 10 seconds. The only difference was (a) a new background, automatically refreshed, and
(b) KCrash was reporting a crash in the system tray.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4503d2efc0 (LWP 997))]

Thread 14 (Thread 0x7f44c9256700 (LWP 1291)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4507e13afb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f4507e13b89 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f4509a544af in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f4509a54729 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f44c9d30700 (LWP 1263)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4507e13afb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f4507e13b89 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f4509a544af in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f4509a54729 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f44cae32700 (LWP 1260)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4507e13afb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f4507e13b89 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f4509a544af in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f4509a54729 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f44cb7fe700 (LWP 1257)):
#0  0x00007f45079feb6f in poll () at /lib64/libc.so.6
#1  0x00007f45065b04de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f450800d59b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f4507e0d77e in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f44cbfff700 (LWP 1256)):
#0  0x00007f45079fa6ec in read () at /lib64/libc.so.6
#1  0x00007f45065f7f4f in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f45065b002e in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f45065b0483 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f450800d59b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f4507e0d77e in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007f44d8eb53e8 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#9  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#11 0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f44da7ef700 (LWP 1254)):
#0  0x00007f45079feb6f in poll () at /lib64/libc.so.6
#1  0x00007f45065b04de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f450800d59b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f4507e0d77e in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f44e4b3c700 (LWP 1236)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4507e13afb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f4507e13b89 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f4509a544af in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f4509a54729 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f44fa30a700 (LWP 1104)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f44fb777bfb in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007f44fb777817 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f44fab0b700 (LWP 1103)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f44fb777bfb in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007f44fb777817 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f44fb30c700 (LWP 1102)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f44fb777bfb in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007f44fb777817 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f4500878700 (LWP 1101)):
#0  0x00007f45071d15a7 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f44fb777bfb in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007f44fb777817 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f450200d700 (LWP 1089)):
#0  0x00007f45079feb6f in poll () at /lib64/libc.so.6
#1  0x00007f45065b04de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f450800d59b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f4507e0d77e in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f45096ee445 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f45032aa700 (LWP 1017)):
#0  0x00007f45079feb6f in poll () at /lib64/libc.so.6
#1  0x00007f45065b04de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f450800d59b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f4507e0d77e in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f4508fdf507 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007f4507e0e7ac in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f45071caea7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4507a0918f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f4503d2efc0 (LWP 997)):
[KCrash Handler]
#6  0x00007f45079486a1 in raise () at /lib64/libc.so.6
#7  0x00007f450793255b in abort () at /lib64/libc.so.6
#8  0x00007f4507dd4d03 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f45037af8e0 in QtWaylandClient::QWaylandDisplay::flushRequests() () at /usr/lib64/libQt5WaylandClient.so.5
#10 0x00007f45037af92e in QtWaylandClient::QWaylandDisplay::flushRequests() () at /usr/lib64/libQt5WaylandClient.so.5
#11 0x00007f4507febf84 in  () at /usr/lib64/libQt5Core.so.5
#12 0x00007f4507fef158 in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#13 0x00007f4507fef4a1 in QSocketNotifier::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#14 0x00007f45089eacef in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#15 0x00007f45089f3e40 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#16 0x00007f4507fb8fdf in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#17 0x00007f450800de8f in  () at /usr/lib64/libQt5Core.so.5
#18 0x00007f45065b02ed in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#19 0x00007f45065b0568 in  () at /usr/lib64/libglib-2.0.so.0
#20 0x00007f45065b05ff in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#21 0x00007f450800d580 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f4507fb7e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#23 0x00007f4507fbfcb2 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#24 0x00005630040604ff in  ()
#25 0x00007f4507933e9b in __libc_start_main () at /lib64/libc.so.6
#26 0x00005630040606ba in _start ()
[Inferior 1 (process 997) detached]

The reporter indicates this bug may be a duplicate of or related to bug 415660.

Possible duplicates by query: bug 419060, bug 419017, bug 418799, bug 418794, bug 418477.

Reported using DrKonqi

Comment 1 Nate Graham 2021-02-25 21:05:12 UTC

> #8  0x00007f4507dd4d03 in  () at /usr/lib64/libQt5Core.so.5
> #9  0x00007f45037af8e0 in QtWaylandClient::QWaylandDisplay::flushRequests() () at /usr/lib64/libQt5WaylandClient.so.5
We will need to know what goes inside () to have any hope of debugging this any further. If you're still experiencing it, can you please install debug symbols and get a new backtrace? See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports

Thanks!

Comment 2 Jack Todaro 2021-02-25 21:16:46 UTC

Hey Nate,

I apologise, I probably should have said so when this appeared to no longer be reproducible. I can't remember the last time I ran into this (being on Gentoo I'm usually on the latest Plasma release immediately).

Sorry for holding you up with an old bug!

Comment 3 Nate Graham 2021-02-25 21:21:14 UTC

OK great, thanks!