DialogBox pops up stating: System settings close unexpectedly when changing desktop theme. - - - - - Application: System Settings (systemsettings5), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f6099ced780 (LWP 4979))] Thread 5 (Thread 0x7f60875ec700 (LWP 4980)): #0 0x00007f60964518dd in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f609476bb72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007f609476d64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007f608a37f099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so #4 0x00007f6096ad2b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f60936856aa in start_thread (arg=0x7f60875ec700) at pthread_create.c:333 #6 0x00007f609645ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 4 (Thread 0x7f6078144700 (LWP 4981)): #0 0x00007f60964518dd in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f6093166ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f6093166fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f6096d69c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f6096d0e3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f6096acdb44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f6095a98f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f6096ad2b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f60936856aa in start_thread (arg=0x7f6078144700) at pthread_create.c:333 #9 0x00007f609645ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 3 (Thread 0x7f606ffff700 (LWP 4982)): #0 0x00007f6093163eda in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007f609316639b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f6093166de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f6093166fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f6096d69c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f6096d0e3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f6096acdb44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f6095a98f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007f6096ad2b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f60936856aa in start_thread (arg=0x7f606ffff700) at pthread_create.c:333 #10 0x00007f609645ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 2 (Thread 0x7f606effe700 (LWP 4983)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f6096ad3c6b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #2 0x00007f6095544fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #3 0x00007f60955453a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #4 0x00007f6096ad2b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f60936856aa in start_thread (arg=0x7f606effe700) at pthread_create.c:333 #6 0x00007f609645ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 1 (Thread 0x7f6099ced780 (LWP 4979)): [KCrash Handler] #6 0x0000000003b93470 in ?? () #7 0x00007f60788626e1 in KDecoration2::Decoration::update(QRect const&) () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5 #8 0x00007f607886275b in KDecoration2::Decoration::update() () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5 #9 0x00007f6074ae1370 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so #10 0x00007f6074b017a8 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so #11 0x00007f6096ab35ca in QPropertyAnimation::updateCurrentValue(QVariant const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #12 0x00007f6096aaef48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #13 0x00007f6096aafd1b in QVariantAnimation::updateCurrentTime(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #14 0x00007f6096aabbaf in QAbstractAnimation::setCurrentTime(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #15 0x00007f6096aabe96 in QUnifiedTimer::updateAnimationTimers(long long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #16 0x00007f6096aac7dc in QAnimationDriver::advanceAnimation(long long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #17 0x00007f60955291ee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #18 0x00007f609554768a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #19 0x00007f6095549a8b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #20 0x00007f609554a30a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #21 0x00007f60975487b5 in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #22 0x00007f609557bdd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #23 0x00007f6097afcb2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #24 0x00007f6097b02000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #25 0x00007f6096d10c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #26 0x00007f6097540e86 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #27 0x00007f6097541bbd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #28 0x00007f609752634f in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #29 0x00007f608a3a9590 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so #30 0x00007f6093166c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #31 0x00007f6093166f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #32 0x00007f6093166fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #33 0x00007f6096d69c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #34 0x00007f6096d0e3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #35 0x00007f6096d1602c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #36 0x000000000040eebc in main () Reproducible: Always Steps to Reproduce: 1. Click Application Launcher 2. Choose System Settings 3. Click Application Style 4. Click Window Declarations Actual Results: DialogBox pops up stating: System settings close unexpectedly when changing desktop theme. Expected Results: Allow choosing/changing desktop theme. OS Kubuntu 15.04 Qt version 5.4.1 Kernel version 3.19.0-20-generic OS type 64-bit System Intel DZ68DB Processor 4 x Intel Core i3-2100 3.10Ghz Memory 16Gb
Unfortunately you are missing some debugging packages, could you please make sure you have all Qt5 and Plasma5 debugging packages installed and try to get a new backtrace. For more information, please see https://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports#Kubuntu
If people don't report crashes as crashes, we cannot find duplicates. *** This bug has been marked as a duplicate of bug 344278 ***