413016 – Plasma crashes when switching windows

Bug 413016 - Plasma crashes when switching windows

Summary: Plasma crashes when switching windows

Status:	RESOLVED DUPLICATE of bug 413018

Alias:	None

Product:	plasmashell
Classification:	Plasma
Component:	general (show other bugs)
Version:	5.16.5
Platform:	Neon Linux

Importance:	NOR crash
Target Milestone:	1.0
Assignee:	David Edmundson

URL:
Keywords:	drkonqi

Depends on:
Blocks:

Reported:	2019-10-16 06:09 UTC by Wian Potgieter
Modified:	2019-10-17 10:39 UTC (History)
CC List:	3 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
New crash information added by DrKonqi (8.88 KB, text/plain) 2019-10-17 06:09 UTC, Wian Potgieter	Details
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Description Wian Potgieter 2019-10-16 06:09:37 UTC

Application: plasmashell (5.16.5)

Qt Version: 5.13.1
Frameworks Version: 5.63.0
Operating System: Linux 5.0.0-31-generic x86_64
Distribution: KDE neon User Edition 5.16

-- Information about the crash:
- What I was doing when the application crashed:
I scrolled the mouse wheel on the task manager to scroll between windows (task manager set to windows on screen & display).  I also just got a crash while typing this when I clicked on "configure panel".  This also happens when I Alt+Tab through my windows.  There is usually a delay, then the window decorations & panels disappear and then they restart.

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 0x7f8cb1723880 (LWP 3723))]

Thread 12 (Thread 0x7f8c426dc700 (LWP 8095)):
#0  0x00007f8ca7d449f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a3f6f86b60) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ca7d449f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a3f6f86b10, cond=0x55a3f6f86b38) at pthread_cond_wait.c:502
#2  0x00007f8ca7d449f3 in __pthread_cond_wait (cond=0x55a3f6f86b38, mutex=0x55a3f6f86b10) at pthread_cond_wait.c:655
#3  0x00007f8cab236b0b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab236e19 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8caf5a3ec8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8caf5a42fa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c426dc700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f8c21c63700 (LWP 24376)):
#0  0x00007f8ca7d449f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a3f7b1d0f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ca7d449f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a3f7b1d0a0, cond=0x55a3f7b1d0c8) at pthread_cond_wait.c:502
#2  0x00007f8ca7d449f3 in __pthread_cond_wait (cond=0x55a3f7b1d0c8, mutex=0x55a3f7b1d0a0) at pthread_cond_wait.c:655
#3  0x00007f8cab236b0b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab236e19 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8caf5a3ec8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8caf5a42fa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c21c63700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f8c41edb700 (LWP 17035)):
#0  0x00007f8ca49ca649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8ca4983fec in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ca4984570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8cab4729db in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8cab22e3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c41edb700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8c415f7700 (LWP 5807)):
[KCrash Handler]
#6  0x00007f8c9df69c48 in QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext*) const () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007f8caba2a55f in QOpenGLContext::create() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f8caf59f5ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f8caf5a0a24 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f8caf5a42b8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f8ca7d3e6db in start_thread (arg=0x7f8c415f7700) at pthread_create.c:463
#13 0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f8c5115d700 (LWP 3971)):
#0  0x00007f8ca7d449f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a3f5815f50) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ca7d449f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a3f5815f00, cond=0x55a3f5815f28) at pthread_cond_wait.c:502
#2  0x00007f8ca7d449f3 in __pthread_cond_wait (cond=0x55a3f5815f28, mutex=0x55a3f5815f00) at pthread_cond_wait.c:655
#3  0x00007f8cab236b0b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab236e19 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8caf5a3ec8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8caf5a42fa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c5115d700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8c53dfb700 (LWP 3966)):
#0  0x00007f8caab1fbf9 in __GI___poll (fds=0x7f8c4c006070, nfds=1, timeout=3500233) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ca49845c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8cab4729db in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8cab22e3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c5b32c197 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c53dfb700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8c62592700 (LWP 3962)):
#0  0x00007f8caab1fbf9 in __GI___poll (fds=0x7f8c57939cd0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ca49845c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8cab4729db in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8cab22e3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8caf51dac6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c62592700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8c7dc37700 (LWP 3957)):
#0  0x00007f8ca7d449f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a3f45dc0e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ca7d449f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a3f45dc090, cond=0x55a3f45dc0b8) at pthread_cond_wait.c:502
#2  0x00007f8ca7d449f3 in __pthread_cond_wait (cond=0x55a3f45dc0b8, mutex=0x55a3f45dc090) at pthread_cond_wait.c:655
#3  0x00007f8cab236b0b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab236e19 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8caf5a3ec8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8caf5a42fa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c7dc37700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8c93bf2700 (LWP 3896)):
#0  0x00007f8caab1fbf9 in __GI___poll (fds=0x7f8c88004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ca49845c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8cab4729db in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8cab22e3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8caf04acb5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c93bf2700) at pthread_create.c:463
#9  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8c999f9700 (LWP 3853)):
#0  0x00007f8ca49ca649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8ca4983b33 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ca49844fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8cab4729db in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8cab22e3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8cac5260e5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c999f9700) at pthread_create.c:463
#10 0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8c9bbe4700 (LWP 3751)):
#0  0x00007f8caab1fbf9 in __GI___poll (fds=0x7f8c9bbe3c28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8cb017a747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8cb017c36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8c9df8bf00 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f8cab22fb72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ca7d3e6db in start_thread (arg=0x7f8c9bbe4700) at pthread_create.c:463
#6  0x00007f8caab2c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8cb1723880 (LWP 3723)):
#0  0x00007f8ca7d449f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a3f61a5030) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ca7d449f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a3f61a4fe0, cond=0x55a3f61a5008) at pthread_cond_wait.c:502
#2  0x00007f8ca7d449f3 in __pthread_cond_wait (cond=0x55a3f61a5008, mutex=0x55a3f61a4fe0) at pthread_cond_wait.c:655
#3  0x00007f8cab236b0b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8cab236e19 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8caf5a10ed in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8caf5a366d in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8caf5a3ce9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f8cab9f3365 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f8caf603995 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f8cb132d4db in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#11 0x00007f8c856f2c75 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/core/libcorebindingsplugin.so
#12 0x00007f8cacd7beac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f8cacd834b0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f8cab414d48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f8cab9e920a in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f8cab9e945d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f8cab9c371b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f8c9df8ceca in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#19 0x00007f8ca4984417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f8ca4984650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f8ca49846dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f8cab4729bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f8cab412eaa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f8cab41c220 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x000055a3f3026f3f in  ()
#26 0x00007f8caaa2cb97 in __libc_start_main (main=0x55a3f30263d0, argc=1, argv=0x7ffe74c72068, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe74c72058) at ../csu/libc-start.c:310
#27 0x000055a3f30273ca in _start ()

Reported using DrKonqi

Comment 1 Wian Potgieter 2019-10-17 06:09:56 UTC

Created attachment 123264 [details]
New crash information added by DrKonqi

plasmashell (5.17.0) using Qt 5.13.1

- What I was doing when the application crashed:

I scrolled the mouse wheel over the Volume icon on the system tray. 

Plasma then crashed and I had to restat it by executing "plasmashell --replace" via the run dialog

-- Backtrace (Reduced):
#6  0x00007f39ecd65dc0 in QSortFilterProxyModelPrivate::build_source_to_proxy_mapping (proxy_to_source=..., source_to_proxy=..., this=0x558bbe558c20) at itemmodels/qsortfilterproxymodel.cpp:1184
#7  0x00007f39ecd6a681 in QSortFilterProxyModelPrivate::sort (this=0x558bbe558c20) at itemmodels/qsortfilterproxymodel.cpp:615
#8  0x00007f39c0a28260 in Image::backgroundsFound (this=0x558bbe55e830) at ./wallpapers/image/image.cpp:641
#9  0x00007f39ecdcf82f in QtPrivate::QSlotObjectBase::call (a=0x7ffd775ce6e0, r=0x558bbe55e830, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
[...]
#11 0x00007f39ecdd0272 in QObject::event (this=0x558bbe558960, e=<optimized out>) at kernel/qobject.cpp:1260

Comment 2 Kai Uwe Broulik 2019-10-17 10:39:30 UTC


*** This bug has been marked as a duplicate of bug 413018 ***