Application: systemsettings5 (5.17.0)
 (Compiled from sources)
Qt Version: 5.13.1
Frameworks Version: 5.64.0
Operating System: Linux 5.0.0-31-generic x86_64
Distribution: KDE neon Testing Edition

-- Information about the crash:
the compositor of kde neon crashes when i change te compositor 2.0 to 3.1, all of system settings crash when i do this

The crash can be reproduced every time.

-- Backtrace:
Application: Preferencias del sistema (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f829e648800 (LWP 1907))]

Thread 7 (Thread 0x7f8264e7d700 (LWP 1915)):
#0  0x00007f8299b76bf9 in __GI___poll (fds=0x7f8258004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8292feb5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8292feb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f829a4c99db in QEventDispatcherGlib::processEvents (this=0x7f8258000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f829a469eaa in QEventLoop::exec (this=this@entry=0x7f8264e7cd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f829a2853ca in QThread::exec (this=this@entry=0x55c10c56b580) at thread/qthread.cpp:531
#6  0x00007f8298029cb5 in QQmlThreadPrivate::run (this=0x55c10c56b580) at qml/ftw/qqmlthread.cpp:152
#7  0x00007f829a286b72 in QThreadPrivate::start (arg=0x55c10c56b580) at thread/qthread_unix.cpp:360
#8  0x00007f82953aa6db in start_thread (arg=0x7f8264e7d700) at pthread_create.c:463
#9  0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f82675ef700 (LWP 1914)):
#0  0x00007f8293031664 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8292feafd9 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8292feb570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8292feb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f829a4c99db in QEventDispatcherGlib::processEvents (this=0x7f8260000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f829a469eaa in QEventLoop::exec (this=this@entry=0x7f82675eed80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f829a2853ca in QThread::exec (this=this@entry=0x55c106a7c980) at thread/qthread.cpp:531
#7  0x00007f8298029cb5 in QQmlThreadPrivate::run (this=0x55c106a7c980) at qml/ftw/qqmlthread.cpp:152
#8  0x00007f829a286b72 in QThreadPrivate::start (arg=0x55c106a7c980) at thread/qthread_unix.cpp:360
#9  0x00007f82953aa6db in start_thread (arg=0x7f82675ef700) at pthread_create.c:463
#10 0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8274a20700 (LWP 1912)):
#0  0x00007f8299b720b4 in __GI___libc_read (fd=13, buf=0x7f8274a1fb70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f82930302d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8292feb0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8292feb570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8292feb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f829a4c99db in QEventDispatcherGlib::processEvents (this=0x7f8268000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f829a469eaa in QEventLoop::exec (this=this@entry=0x7f8274a1fd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f829a2853ca in QThread::exec (this=this@entry=0x55c10675d2d0) at thread/qthread.cpp:531
#8  0x00007f8298029cb5 in QQmlThreadPrivate::run (this=0x55c10675d2d0) at qml/ftw/qqmlthread.cpp:152
#9  0x00007f829a286b72 in QThreadPrivate::start (arg=0x55c10675d2d0) at thread/qthread_unix.cpp:360
#10 0x00007f82953aa6db in start_thread (arg=0x7f8274a20700) at pthread_create.c:463
#11 0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f827a0c4700 (LWP 1910)):
#0  0x00007f82953b09f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c1063bd998) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55c1063bd948, cond=0x55c1063bd970) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55c1063bd970, mutex=0x55c1063bd948) at pthread_cond_wait.c:655
#3  0x00007f827b3972cb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f827b396ff7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f82953aa6db in start_thread (arg=0x7f827a0c4700) at pthread_create.c:463
#6  0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8282afb700 (LWP 1909)):
#0  0x00007f8299b76bf9 in __GI___poll (fds=0x7f827c004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8292feb5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8292feb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f829a4c99db in QEventDispatcherGlib::processEvents (this=0x7f827c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f829a469eaa in QEventLoop::exec (this=this@entry=0x7f8282afad70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f829a2853ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f829a9400e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f829a286b72 in QThreadPrivate::start (arg=0x7f829abb7d80) at thread/qthread_unix.cpp:360
#8  0x00007f82953aa6db in start_thread (arg=0x7f8282afb700) at pthread_create.c:463
#9  0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f828ab2d700 (LWP 1908)):
#0  0x00007f8299b76bf9 in __GI___poll (fds=0x7f828ab2cca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8294f6e747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8294f7036a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f828d912f00 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f829a286b72 in QThreadPrivate::start (arg=0x55c10637f3f0) at thread/qthread_unix.cpp:360
#5  0x00007f82953aa6db in start_thread (arg=0x7f828ab2d700) at pthread_create.c:463
#6  0x00007f8299b8388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f829e648800 (LWP 1907)):
[KCrash Handler]
#6  QQuickWindowPrivate::dirtyItem (this=0x200000002) at items/qquickwindow.cpp:1158
#7  0x00007f82985b8d65 in QQuickItemPrivate::dirty (this=<optimized out>, type=<optimized out>) at items/qquickitem.cpp:6135
#8  0x00007f82985b91be in QQuickItem::update (this=<optimized out>) at items/qquickitem.cpp:4439
#9  0x00007f829861d7b2 in QQuickText::setLinkColor (this=0x55c10e50f0f0, color=...) at items/qquicktext.cpp:1751
#10 0x00007f82986266eb in QQuickText::qt_static_metacall (_o=_o@entry=0x55c10e50f0f0, _c=_c@entry=QMetaObject::WriteProperty, _id=_id@entry=3, _a=_a@entry=0x7ffdce419940) at .moc/moc_qquicktext_p.cpp:885
#11 0x00007f8298626b83 in QQuickText::qt_metacall (this=this@entry=0x55c10e50f0f0, _c=_c@entry=QMetaObject::WriteProperty, _id=3, _a=_a@entry=0x7ffdce419940) at .moc/moc_qquicktext_p.cpp:966
#12 0x00007f8288ffb9d5 in QQuickLabel::qt_metacall (this=0x55c10e50f0f0, _c=QMetaObject::WriteProperty, _id=<optimized out>, _a=0x7ffdce419940) at .moc/moc_qquicklabel_p.cpp:318
#13 0x00007f82980097c6 in QV4::QQmlValueTypeWrapper::write (this=this@entry=0x7f826423e4c8, target=0x55c10e50f0f0, propertyIndex=47) at qml/qqmlvaluetypewrapper.cpp:331
#14 0x00007f82980022c4 in GenericBinding<0>::write (this=0x55c10e50fa60, result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:318
#15 0x00007f8298003417 in QQmlNonbindingBinding::doUpdate (this=0x55c10e50fa60, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:249
#16 0x00007f8297fff9e3 in QQmlBinding::update (this=0x55c10e50fa60, flags=...) at qml/qqmlbinding.cpp:185
#17 0x00007f8297fd90e2 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:104
#18 0x00007f8297f80439 in QQmlData::signalEmitted (object=0x55c10e529590, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:887
#19 0x00007f829a49bf37 in QMetaObject::activate (sender=0x55c10e529590, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3678
#20 0x00007f829a49cdd7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f826f374960 <Kirigami::PlatformTheme::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3660
#21 0x00007f826f1658d0 in Kirigami::PlatformTheme::colorsChanged (this=<optimized out>) at ./obj-x86_64-linux-gnu/src/libkirigami/KF5Kirigami2_autogen/include/moc_platformtheme.cpp:399
#22 0x00007f826f1665b0 in Kirigami::PlatformThemePrivate::<lambda()>::operator() (__closure=0x55c10dac51a0) at ./src/libkirigami/platformtheme.cpp:191
#23 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, Kirigami::PlatformThemePrivate::emitCompressedColorChanged()::<lambda()> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#24 QtPrivate::Functor<Kirigami::PlatformThemePrivate::emitCompressedColorChanged()::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#25 QtPrivate::QFunctorSlotObject<Kirigami::PlatformThemePrivate::emitCompressedColorChanged()::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x55c10dac5190, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:439
#26 0x00007f829a49d272 in QObject::event (this=0x55c10e529590, e=<optimized out>) at kernel/qobject.cpp:1260
#27 0x00007f829b4ffeac in QApplicationPrivate::notify_helper (this=this@entry=0x55c10635f880, receiver=receiver@entry=0x55c10e529590, e=e@entry=0x55c10e3acfa0) at kernel/qapplication.cpp:3703
#28 0x00007f829b5074b0 in QApplication::notify (this=0x7ffdce41bcd0, receiver=0x55c10e529590, e=0x55c10e3acfa0) at kernel/qapplication.cpp:3449
#29 0x00007f829a46bd48 in QCoreApplication::notifyInternal2 (receiver=0x55c10e529590, event=0x55c10e3acfa0) at kernel/qcoreapplication.cpp:1095
#30 0x00007f829a46bf1e in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x55c10e3acfa0) at kernel/qcoreapplication.cpp:1490
#31 0x00007f829a46e667 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55c106356ff0) at kernel/qcoreapplication.cpp:1840
#32 0x00007f829a46ebf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1694
#33 0x00007f829a4ca3a3 in postEventSourceDispatch (s=0x55c1063b56a0) at kernel/qeventdispatcher_glib.cpp:277
#34 0x00007f8292feb417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f8292feb650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f8292feb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f829a4c99bf in QEventDispatcherGlib::processEvents (this=0x55c1063c6270, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#38 0x00007f829a469eaa in QEventLoop::exec (this=this@entry=0x7ffdce41bbf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#39 0x00007f829a473220 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1403
#40 0x000055c105fd2218 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71

Possible duplicates by query: bug 403978, bug 360592, bug 360130, bug 357070, bug 355136.

Reported using DrKonqi