[kde] [Bug 384252] New: Taskbar disappears when Look and Feel changed

Aidan Cubley bugzilla_noreply at kde.org
Fri Sep 1 07:11:50 BST 2017 

https://bugs.kde.org/show_bug.cgi?id=384252

            Bug ID: 384252
           Summary: Taskbar disappears when Look and Feel changed
           Product: kde
           Version: unspecified
          Platform: unspecified
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: it_lives at hotmail.com
  Target Milestone: ---

Application: kcmshell5 (5.9.5)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-33-generic x86_64
Distribution: Ubuntu 17.04

-- Information about the crash:
- What I was doing when the application crashed:
I changed the Look and Feel to Breeze Dark after moving the taskbar to the left
side of the monitor. I did click "Use Desktop Layout from theme ."
- Custom settings of the application:
New install, replicated on entirely new user.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings Module (kcmshell5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb2fcac6240 (LWP 2054))]

Thread 4 (Thread 0x7fb2dafb0700 (LWP 2057)):
#0  0x00007fb2f473ca79 in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2f473d49b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2f473d68c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2f9bbe0bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2f9b67bea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2f9995f83 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2f8522df5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb2f999ac38 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2f6ba96da in start_thread (arg=0x7fb2dafb0700) at
pthread_create.c:456
#9  0x00007fb2fc4a9d7f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fb2e17e9700 (LWP 2056)):
#0  0x00007fb2fc49dd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2f473d576 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2f473d68c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2f9bbe0bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2f9b67bea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2f9995f83 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2fb5415d5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fb2f999ac38 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2f6ba96da in start_thread (arg=0x7fb2e17e9700) at
pthread_create.c:456
#9  0x00007fb2fc4a9d7f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fb2ea586700 (LWP 2055)):
#0  0x00007fb2fc49dd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2f6fccc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb2f6fce8d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb2ed110ef9 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fb2f999ac38 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2f6ba96da in start_thread (arg=0x7fb2ea586700) at
pthread_create.c:456
#6  0x00007fb2fc4a9d7f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fb2fcac6240 (LWP 2054)):
[KCrash Handler]
#6  0x00007fb2f89eb010 in QQuickWindow::setColor(QColor const&) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fb2fc173a41 in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#8  0x00007fb2f9b95afe in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb2fa0a3825 in QGuiApplication::paletteChanged(QPalette const&) ()
from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007fb2e91114a5 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/KDEPlasmaPlatformTheme.so
#11 0x00007fb2e911e315 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/KDEPlasmaPlatformTheme.so
#12 0x00007fb2fb54b570 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#13 0x00007fb2f9b96639 in QObject::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fb2fa84035c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fb2fa847b21 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fb2f9b69c00 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fb2f9b6c39d in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fb2f9bbdc93 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fb2f473d377 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fb2f473d5e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fb2f473d68c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fb2f9bbe09f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fb2f9b67bea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fb2f9b7033c in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fb2fc77009b in kdemain () from
/usr/lib/x86_64-linux-gnu/libkdeinit5_kcmshell5.so
#26 0x00007fb2fc3c13f1 in __libc_start_main (main=0x559e35270780, argc=2,
argv=0x7fff6e8b7ff8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fff6e8b7fe8) at ../csu/libc-start.c:291
#27 0x0000559e352707ba in _start ()

Reported using DrKonqi

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