Bug 381184

Application: systemsettings5 (5.10.1)

Qt Version: 5.7.1
Frameworks Version: 5.35.0
Operating System: Linux 4.8.0-54-generic x86_64
Distribution: KDE neon User Edition 5.10

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

If I open System Settings and try to preview the Breeze Task Switcher three times in a row then System Settigns will crash. The other Task Switcher models do not cause a crash.

The crash can be reproduced every time.

-- Backtrace:
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 0x7f22f7e188c0 (LWP 2285))]

Thread 8 (Thread 0x7f22a51bf700 (LWP 2863)):
#0  0x00007f22f453eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22ef69138c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22f4e5e75b in QEventDispatcherGlib::processEvents (this=0x7f227c10fcb0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7f22a51bece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f22f4c38f64 in QThread::exec (this=this@entry=0x292e6a0) at thread/qthread.cpp:507
#6  0x00007f22f3593bf5 in QQmlThreadPrivate::run (this=0x292e6a0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x292e6a0) at thread/qthread_unix.cpp:368
#8  0x00007f22f174c6ba in start_thread (arg=0x7f22a51bf700) at pthread_create.c:333
#9  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f22b5b8d700 (LWP 2308)):
#0  0x00007f22ef6d5a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f22ef690464 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22ef691346 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f22f4e5e75b in QEventDispatcherGlib::processEvents (this=0x7f22b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7f22b5b8cce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f22f4c38f64 in QThread::exec (this=this@entry=0x2ba53b0) at thread/qthread.cpp:507
#7  0x00007f22f3593bf5 in QQmlThreadPrivate::run (this=0x2ba53b0) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x2ba53b0) at thread/qthread_unix.cpp:368
#9  0x00007f22f174c6ba in start_thread (arg=0x7f22b5b8d700) at pthread_create.c:333
#10 0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f22c4ca1700 (LWP 2303)):
#0  0x00007f22f453eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22ef69138c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22f4e5e75b in QEventDispatcherGlib::processEvents (this=0x7f22b80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7f22c4ca0ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f22f4c38f64 in QThread::exec (this=this@entry=0x26efd20) at thread/qthread.cpp:507
#6  0x00007f22f3593bf5 in QQmlThreadPrivate::run (this=0x26efd20) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x26efd20) at thread/qthread_unix.cpp:368
#8  0x00007f22f174c6ba in start_thread (arg=0x7f22c4ca1700) at pthread_create.c:333
#9  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f22cd85d700 (LWP 2291)):
#0  0x00007f22f453eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22ef69138c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22f4e5e75b in QEventDispatcherGlib::processEvents (this=0x7f22c80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7f22cd85cce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f22f4c38f64 in QThread::exec (this=this@entry=0x1ebbee0) at thread/qthread.cpp:507
#6  0x00007f22f3593bf5 in QQmlThreadPrivate::run (this=0x1ebbee0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x1ebbee0) at thread/qthread_unix.cpp:368
#8  0x00007f22f174c6ba in start_thread (arg=0x7f22cd85d700) at pthread_create.c:333
#9  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f22d15a3700 (LWP 2289)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f22d55018c3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f22d5501487 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f22f174c6ba in start_thread (arg=0x7f22d15a3700) at pthread_create.c:333
#4  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f22de0da700 (LWP 2288)):
#0  0x00007f22f453eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22ef69138c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22f4e5e75b in QEventDispatcherGlib::processEvents (this=0x7f22d80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7f22de0d9cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f22f4c38f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f22f7f6f735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x7f22f7fe3d60) at thread/qthread_unix.cpp:368
#8  0x00007f22f174c6ba in start_thread (arg=0x7f22de0da700) at pthread_create.c:333
#9  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f22e6840700 (LWP 2287)):
#0  0x00007f22f453eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22f1fc2c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f22f1fc48d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f22e8d98d79 in QXcbEventReader::run (this=0x19de960) at qxcbconnection.cpp:1343
#4  0x00007f22f4c3db48 in QThreadPrivate::start (arg=0x19de960) at thread/qthread_unix.cpp:368
#5  0x00007f22f174c6ba in start_thread (arg=0x7f22e6840700) at pthread_create.c:333
#6  0x00007f22f454a82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f22f7e188c0 (LWP 2285)):
[KCrash Handler]
#6  std::__atomic_base<int>::load (__m=std::memory_order_relaxed, this=0x10) at /usr/include/c++/5/bits/atomic_base.h:396
#7  QAtomicOps<int>::load<int> (_q_value=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qatomic_cxx11.h:227
#8  QBasicAtomicInteger<int>::load (this=0x10) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qbasicatomic.h:99
#9  QtPrivate::RefCount::isShared (this=0x10) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qrefcount.h:101
#10 QHash<Plasma::FrameSvg*, int>::detach (this=0x1a2c788) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:273
#11 QHash<Plasma::FrameSvg*, int>::operator[] (akey=@0x7ffcc302a1c8: 0x2e2e840, this=0x1a2c788) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:741
#12 Plasma::FrameData::ref (this=0x1a2c6d0, svg=0x2e2e840) at /workspace/build/src/plasma/framesvg.cpp:973
#13 0x00007f22cdd956e5 in Plasma::FrameSvgPrivate::alphaMask (this=0x306dd60) at /workspace/build/src/plasma/framesvg.cpp:485
#14 0x00007f22cdd96323 in Plasma::FrameSvg::mask (this=0x2e2e840) at /workspace/build/src/plasma/framesvg.cpp:326
#15 0x00007f22c7b6c41c in PlasmaQuick::DialogPrivate::updateTheme (this=0x396bc40) at /workspace/build/src/plasmaquick/dialog.cpp:247
#16 0x00007f22c7b6e81d in PlasmaQuick::Dialog::componentComplete (this=0x38cc370) at /workspace/build/src/plasmaquick/dialog.cpp:1313
#17 0x00007f22f358a3fc in QQmlObjectCreator::finalize (this=0x3293460, interrupt=...) at qml/qqmlobjectcreator.cpp:1241
#18 0x00007f22f351718e in QQmlComponentPrivate::complete (enginePriv=0x36b77f0, state=0x3157520) at qml/qqmlcomponent.cpp:929
#19 0x00007f22f3517257 in QQmlComponentPrivate::completeCreate (this=0x3157480) at qml/qqmlcomponent.cpp:965
#20 0x00007f22f35170c0 in QQmlComponent::create (this=0x22090d0, context=0x31252d0) at qml/qqmlcomponent.cpp:791
#21 0x00007f22acd6ddab in KWin::TabBox::LayoutPreview::LayoutPreview (this=0x3d06030, path=..., parent=<optimized out>) at /workspace/build/kcmkwin/kwintabbox/layoutpreview.cpp:52
#22 0x00007f22acd67b2b in KWin::KWinTabBoxConfig::configureEffectClicked (this=0x2ed8b20) at /workspace/build/kcmkwin/kwintabbox/main.cpp:530
#23 0x00007f22f4e35e89 in QMetaObject::activate (sender=sender@entry=0x4bfa4a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffcc302a940) at kernel/qobject.cpp:3740
#24 0x00007f22f4e36837 in QMetaObject::activate (sender=sender@entry=0x4bfa4a0, m=m@entry=0x7f22f67bd480 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffcc302a940) at kernel/qobject.cpp:3602
#25 0x00007f22f63caa42 in QAbstractButton::clicked (this=this@entry=0x4bfa4a0, _t1=false) at .moc/moc_qabstractbutton.cpp:307
#26 0x00007f22f63cac94 in QAbstractButtonPrivate::emitClicked (this=0x4bfa4e0) at widgets/qabstractbutton.cpp:411
#27 0x00007f22f63cc967 in QAbstractButtonPrivate::click (this=0x4bfa4e0) at widgets/qabstractbutton.cpp:404
#28 0x00007f22f63ccae4 in QAbstractButton::mouseReleaseEvent (this=0x4bfa4a0, e=0x7ffcc302ae00) at widgets/qabstractbutton.cpp:1009
#29 0x00007f22f632af38 in QWidget::event (this=0x4bfa4a0, event=0x7ffcc302ae00) at kernel/qwidget.cpp:9161
#30 0x00007f22f62e3ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x4bfa4a0, e=0x7ffcc302ae00) at kernel/qapplication.cpp:3799
#31 0x00007f22f62ec165 in QApplication::notify (this=<optimized out>, receiver=0x4bfa4a0, e=0x7ffcc302ae00) at kernel/qapplication.cpp:3273
#32 0x00007f22f4e0b0c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x4bfa4a0, event=event@entry=0x7ffcc302ae00) at kernel/qcoreapplication.cpp:988
#33 0x00007f22f62eae8f in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#34 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x4bfa4a0, event=event@entry=0x7ffcc302ae00, alienWidget=alienWidget@entry=0x4bfa4a0, nativeWidget=0x1d0bf80, buttonDown=buttonDown@entry=0x7f22f67e7c80 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2771
#35 0x00007f22f6345236 in QWidgetWindow::handleMouseEvent (this=this@entry=0x3a10680, event=event@entry=0x7ffcc302b210) at kernel/qwidgetwindow.cpp:617
#36 0x00007f22f6347c83 in QWidgetWindow::event (this=0x3a10680, event=0x7ffcc302b210) at kernel/qwidgetwindow.cpp:239
#37 0x00007f22f62e3ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x3a10680, e=0x7ffcc302b210) at kernel/qapplication.cpp:3799
#38 0x00007f22f62eb8c6 in QApplication::notify (this=0x7ffcc302b6d0, receiver=0x3a10680, e=0x7ffcc302b210) at kernel/qapplication.cpp:3556
#39 0x00007f22f4e0b0c8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x3a10680, event=event@entry=0x7ffcc302b210) at kernel/qcoreapplication.cpp:988
#40 0x00007f22f5d485a0 in QCoreApplication::sendSpontaneousEvent (event=0x7ffcc302b210, receiver=0x3a10680) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#41 QGuiApplicationPrivate::processMouseEvent (e=0x31b3b20) at kernel/qguiapplication.cpp:1903
#42 0x00007f22f5d4a4a5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x31b3b20) at kernel/qguiapplication.cpp:1687
#43 0x00007f22f5d2832b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:659
#44 0x00007f22e8dcf270 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:76
#45 0x00007f22ef691197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f22ef6913f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f22ef69149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f22f4e5e73f in QEventDispatcherGlib::processEvents (this=0x1a15820, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#49 0x00007f22f4e090ba in QEventLoop::exec (this=this@entry=0x7ffcc302b5b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#50 0x00007f22f4e116cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#51 0x00007f22f5d4024c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1633
#52 0x00007f22f62e3e25 in QApplication::exec () at kernel/qapplication.cpp:2975
#53 0x000000000040b644 in main (argc=1, argv=<optimized out>) at /workspace/build/app/main.cpp:62

Possible duplicates by query: bug 372712.

Reported using DrKonqi