Application: systemsettings5 (5.13.4)

Qt Version: 5.11.1
Frameworks Version: 5.50.0
Operating System: Linux 4.15.0-32-generic x86_64
Distribution: KDE neon Developer Edition

-- Information about the crash:
- What I was doing when the application crashed:
Switching tabs in system settings caused crash. happened every time I tried to edit stuff in workspace theme

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 0x7f725654b840 (LWP 26712))]

Thread 7 (Thread 0x7f7212d07700 (LWP 26720)):
#0  idleTimerSourcePrepare (source=<optimized out>, timeout=0x7f7212d06b74) at kernel/qeventdispatcher_glib.cpp:207
#1  0x00007f724aea8998 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f724aea936b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f724aea954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f725248ea9b in QEventDispatcherGlib::processEvents (this=0x7f720c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7252432dea in QEventLoop::exec (this=this@entry=0x7f7212d06d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f725225db8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f724ff5c8b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f7252268aab in QThreadPrivate::start (arg=0x55d2be5fa0b0) at thread/qthread_unix.cpp:367
#9  0x00007f724d2676db in start_thread (arg=0x7f7212d07700) at pthread_create.c:463
#10 0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f721ac48700 (LWP 26719)):
#0  0x00007f724aeeecd9 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f724aea82e0 in g_main_context_acquire () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f724aea92f5 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f724aea954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f725248ea9b in QEventDispatcherGlib::processEvents (this=0x7f7214000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7252432dea in QEventLoop::exec (this=this@entry=0x7f721ac47d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f725225db8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f724ff5c8b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f7252268aab in QThreadPrivate::start (arg=0x55d2be00ecf0) at thread/qthread_unix.cpp:367
#9  0x00007f724d2676db in start_thread (arg=0x7f721ac48700) at pthread_create.c:463
#10 0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f7222b81700 (LWP 26718)):
#0  0x00007f724aea6342 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f724aea88d3 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f724aea936b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f724aea954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f725248ea9b in QEventDispatcherGlib::processEvents (this=0x7f721c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7252432dea in QEventLoop::exec (this=this@entry=0x7f7222b80d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f725225db8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f724ff5c8b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f7252268aab in QThreadPrivate::start (arg=0x55d2bdcabc60) at thread/qthread_unix.cpp:367
#9  0x00007f724d2676db in start_thread (arg=0x7f7222b81700) at pthread_create.c:463
#10 0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f722d770700 (LWP 26716)):
#0  0x00007f724d26d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d2bd9c6d88) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55d2bd9c6d38, cond=0x55d2bd9c6d60) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55d2bd9c6d60, mutex=0x55d2bd9c6d38) at pthread_cond_wait.c:655
#3  0x00007f7232a1d46b in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007f7232a1d197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007f724d2676db in start_thread (arg=0x7f722d770700) at pthread_create.c:463
#6  0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7239c6e700 (LWP 26715)):
#0  0x00007f7251b4ebf9 in __GI___poll (fds=0x7f7234004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f724aea9439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f724aea954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f725248ea9b in QEventDispatcherGlib::processEvents (this=0x7f7234000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7252432dea in QEventLoop::exec (this=this@entry=0x7f7239c6dd30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f725225db8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f72528d6e45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f7252268aab in QThreadPrivate::start (arg=0x7f7252b4ed60) at thread/qthread_unix.cpp:367
#8  0x00007f724d2676db in start_thread (arg=0x7f7239c6e700) at pthread_create.c:463
#9  0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f7242e93700 (LWP 26714)):
#0  0x00007f7251b4ebf9 in __GI___poll (fds=0x7f7242e92c68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f724ce2b747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f724ce2d36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f724582a129 in QXcbEventReader::run (this=0x55d2bd8eb400) at qxcbconnection.cpp:1388
#4  0x00007f7252268aab in QThreadPrivate::start (arg=0x55d2bd8eb400) at thread/qthread_unix.cpp:367
#5  0x00007f724d2676db in start_thread (arg=0x7f7242e93700) at pthread_create.c:463
#6  0x00007f7251b5b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f725654b840 (LWP 26712)):
[KCrash Handler]
#6  QQuickWindowPrivate::removeGrabber (this=this@entry=0x6c6172656e6547, grabber=0x55d2be807090, mouse=mouse@entry=true, touch=touch@entry=true) at items/qquickwindow.cpp:813
#7  0x00007f725049dad0 in QQuickItemPrivate::derefWindow (this=this@entry=0x55d2be807150) at items/qquickitem.cpp:3050
#8  0x00007f725049e047 in QQuickItem::setParentItem (this=0x55d2be807090, parentItem=parentItem@entry=0x0) at items/qquickitem.cpp:2741
#9  0x00007f725049fa6c in QQuickItem::~QQuickItem (this=0x55d2be806b30, __in_chrg=<optimized out>) at items/qquickitem.cpp:2391
#10 0x00007f721b6b919d in QQuickItemDelegate::~QQuickItemDelegate (this=0x55d2be806b30, __in_chrg=<optimized out>) at ../../../include/QtQuickTemplates2/5.11.1/QtQuickTemplates2/private/../../../../../src/quicktemplates2/qquickitemdelegate_p.h:57
#11 QQmlPrivate::QQmlElement<QQuickItemDelegate>::~QQmlElement (this=0x55d2be806b30, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:103
#12 QQmlPrivate::QQmlElement<QQuickItemDelegate>::~QQmlElement (this=0x55d2be806b30, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:103
#13 0x00007f7252464660 in QObject::event (this=this@entry=0x55d2be806b30, e=e@entry=0x55d2be894f20) at kernel/qobject.cpp:1242
#14 0x00007f725049caeb in QQuickItem::event (this=0x55d2be806b30, ev=0x55d2be894f20) at items/qquickitem.cpp:8003
#15 0x00007f7253450e8c in QApplicationPrivate::notify_helper (this=this@entry=0x55d2bd908e30, receiver=receiver@entry=0x55d2be806b30, e=e@entry=0x55d2be894f20) at kernel/qapplication.cpp:3727
#16 0x00007f725345845f in QApplication::notify (this=0x7ffd3e55d460, receiver=0x55d2be806b30, e=0x55d2be894f20) at kernel/qapplication.cpp:3486
#17 0x00007f7252434ab8 in QCoreApplication::notifyInternal2 (receiver=0x55d2be806b30, event=event@entry=0x55d2be894f20) at kernel/qcoreapplication.cpp:1048
#18 0x00007f72524375fd in QCoreApplication::sendEvent (event=0x55d2be894f20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#19 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55d2bd8f0a00) at kernel/qcoreapplication.cpp:1745
#20 0x00007f7252437bb8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#21 0x00007f725248f453 in postEventSourceDispatch (s=0x55d2bd9614d0) at kernel/qeventdispatcher_glib.cpp:276
#22 0x00007f724aea9287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f724aea94c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f724aea954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f725248ea7f in QEventDispatcherGlib::processEvents (this=0x55d2bd9647d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#26 0x00007f72458b4ed1 in QPAEventDispatcherGlib::processEvents (this=0x55d2bd9647d0, flags=...) at qeventdispatcher_glib.cpp:69
#27 0x00007f7252432dea in QEventLoop::exec (this=this@entry=0x7ffd3e55d380, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#28 0x00007f725243bfa0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#29 0x000055d2bc4e1fcf in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:73

The reporter indicates this bug may be a duplicate of or related to bug 397367.

Possible duplicates by query: bug 397547, bug 397367.

Reported using DrKonqi