411794 – System settings crashes when a change in "Display configuration" KCM is discarted

Bug 411794 - System settings crashes when a change in "Display configuration" KCM is discarted

Summary: System settings crashes when a change in "Display configuration" KCM is disca...

Status:	RESOLVED DUPLICATE of bug 419625

Alias:	None

Product:	systemsettings
Classification:	Applications
Component:	kcm_kscreen (show other bugs)
Version:	5.14.3
Platform:	unspecified Linux

Importance:	NOR crash
Target Milestone:	---
Assignee:	kscreen-bugs-null@kde.org

URL:
Keywords:	drkonqi

Duplicates (2):	413913 418018 (view as bug list)
Depends on:
Blocks:

Reported:	2019-09-10 14:16 UTC by Patrick Silva
Modified:	2020-04-04 12:19 UTC (History)
CC List:	7 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

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Description Patrick Silva 2019-09-10 14:16:47 UTC

Application: systemsettings5 (5.16.80)

Qt Version: 5.12.3
Frameworks Version: 5.62.0
Operating System: Linux 5.2.5-050205-generic x86_64
Distribution: KDE neon Unstable Edition

-- Information about the crash:
- What I was doing when the application crashed:
open system settings > display and monitor
use the slider to change the display scale
try to close system settings
click "Discard" button... 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 0x7f8ce265f800 (LWP 3680))]

Thread 7 (Thread 0x7f8cab09a700 (LWP 3695)):
#0  0x00007f8cddbb50b4 in __GI___libc_read (fd=29, buf=0x7f8cab099bde, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8cbd71a021 in pa_read () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f8cbdb9da2e in pa_mainloop_prepare () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f8cbdb9e4a0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f8cbdb9e560 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f8cbdbac3c9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f8cbd749318 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f8cd93fe6db in start_thread (arg=0x7f8cab09a700) at pthread_create.c:463
#8  0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8cabd1c700 (LWP 3694)):
#0  0x00007f8cddbb50b4 in __GI___libc_read (fd=22, buf=buf@entry=0x7f8cabd1bb90, nbytes=nbytes@entry=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8cd70842d0 in read (__nbytes=16, __buf=0x7f8cabd1bb90, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  g_wakeup_acknowledge (wakeup=0x7f8ca4003590) at ../../../../glib/gwakeup.c:210
#3  0x00007f8cd703f0b7 in g_main_context_check (context=context@entry=0x7f8c9c000bf0, max_priority=2147483647, fds=fds@entry=0x7f8c9c003ce0, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3680
#4  0x00007f8cd703f570 in g_main_context_iterate (context=context@entry=0x7f8c9c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#5  0x00007f8cd703f6dc in g_main_context_iteration (context=0x7f8c9c000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#6  0x00007f8cde4fcdcb in QEventDispatcherGlib::processEvents (this=0x7f8c9c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#7  0x00007f8cde49e03a in QEventLoop::exec (this=this@entry=0x7f8cabd1bda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#8  0x00007f8cde2c54ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#9  0x00007f8cde2c6c72 in QThreadPrivate::start (arg=0x7f8ca4009000) at thread/qthread_unix.cpp:361
#10 0x00007f8cd93fe6db in start_thread (arg=0x7f8cabd1c700) at pthread_create.c:463
#11 0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8cac51d700 (LWP 3688)):
#0  0x00007f8cde4fd483 in postEventSourceCheck (source=0x7f8ca40047a0) at kernel/qeventdispatcher_glib.cpp:268
#1  0x00007f8cd703efe1 in g_main_context_check (context=context@entry=0x7f8ca4000bf0, max_priority=2147483647, fds=fds@entry=0x7f8ca40049b0, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3735
#2  0x00007f8cd703f570 in g_main_context_iterate (context=context@entry=0x7f8ca4000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#3  0x00007f8cd703f6dc in g_main_context_iteration (context=0x7f8ca4000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007f8cde4fcdcb in QEventDispatcherGlib::processEvents (this=0x7f8ca4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f8cde49e03a in QEventLoop::exec (this=this@entry=0x7f8cac51cda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f8cde2c54ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f8cde2c6c72 in QThreadPrivate::start (arg=0x55b8b83d3c90) at thread/qthread_unix.cpp:361
#8  0x00007f8cd93fe6db in start_thread (arg=0x7f8cac51d700) at pthread_create.c:463
#9  0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8cb6eed700 (LWP 3685)):
#0  0x00007f8cddbb50b4 in __GI___libc_read (fd=10, buf=buf@entry=0x7f8cb6eecb70, nbytes=nbytes@entry=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8cd70842d0 in read (__nbytes=16, __buf=0x7f8cb6eecb70, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  g_wakeup_acknowledge (wakeup=0x7f8cc8003db0) at ../../../../glib/gwakeup.c:210
#3  0x00007f8cd703f0b7 in g_main_context_check (context=context@entry=0x7f8cb0000bf0, max_priority=2147483647, fds=fds@entry=0x7f8cb0004e00, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3680
#4  0x00007f8cd703f570 in g_main_context_iterate (context=context@entry=0x7f8cb0000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#5  0x00007f8cd703f6dc in g_main_context_iteration (context=0x7f8cb0000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#6  0x00007f8cde4fcdcb in QEventDispatcherGlib::processEvents (this=0x7f8cb0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#7  0x00007f8cde49e03a in QEventLoop::exec (this=this@entry=0x7f8cb6eecd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#8  0x00007f8cde2c54ca in QThread::exec (this=this@entry=0x55b8b392fa30) at thread/qthread.cpp:531
#9  0x00007f8cdc07e115 in QQmlThreadPrivate::run (this=0x55b8b392fa30) at qml/ftw/qqmlthread.cpp:148
#10 0x00007f8cde2c6c72 in QThreadPrivate::start (arg=0x55b8b392fa30) at thread/qthread_unix.cpp:361
#11 0x00007f8cd93fe6db in start_thread (arg=0x7f8cb6eed700) at pthread_create.c:463
#12 0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8cc4b6a700 (LWP 3682)):
#0  0x00007f8cd94049f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b8b353c548) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55b8b353c4f8, cond=0x55b8b353c520) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55b8b353c520, mutex=0x55b8b353c4f8) at pthread_cond_wait.c:655
#3  0x00007f8cc5e4e0aa in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f8cc5e4ddd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f8cd93fe6db in start_thread (arg=0x7f8cc4b6a700) at pthread_create.c:463
#6  0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8ccdc6c700 (LWP 3681)):
#0  0x00007f8cddbb50b4 in __GI___libc_read (fd=5, buf=buf@entry=0x7f8ccdc6bb60, nbytes=nbytes@entry=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8cd70842d0 in read (__nbytes=16, __buf=0x7f8ccdc6bb60, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  g_wakeup_acknowledge (wakeup=0x55b8b34c15c0) at ../../../../glib/gwakeup.c:210
#3  0x00007f8cd703f0b7 in g_main_context_check (context=context@entry=0x7f8cc8000bf0, max_priority=2147483647, fds=fds@entry=0x7f8cc8003ce0, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3680
#4  0x00007f8cd703f570 in g_main_context_iterate (context=context@entry=0x7f8cc8000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#5  0x00007f8cd703f6dc in g_main_context_iteration (context=0x7f8cc8000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#6  0x00007f8cde4fcdcb in QEventDispatcherGlib::processEvents (this=0x7f8cc8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#7  0x00007f8cde49e03a in QEventLoop::exec (this=this@entry=0x7f8ccdc6bd70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#8  0x00007f8cde2c54ca in QThread::exec (this=this@entry=0x7f8cdebe2d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:531
#9  0x00007f8cde96b015 in QDBusConnectionManager::run (this=0x7f8cdebe2d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#10 0x00007f8cde2c6c72 in QThreadPrivate::start (arg=0x7f8cdebe2d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361
#11 0x00007f8cd93fe6db in start_thread (arg=0x7f8ccdc6c700) at pthread_create.c:463
#12 0x00007f8cddbc688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8ce265f800 (LWP 3680)):
[KCrash Handler]
#7  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator-> (this=0x459) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:118
#8  qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > > (ptr=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1038
#9  QQuickWindow::d_func (this=0x451) at items/qquickwindow.h:78
#10 QQuickWindow::maybeUpdate (this=0x451) at items/qquickwindow.cpp:3569
#11 0x00007f8cdc618f09 in QQuickWindowPrivate::dirtyItem (this=<optimized out>) at items/qquickwindow.cpp:1146
#12 0x00007f8cdc5ff5a5 in QQuickItemPrivate::dirty (this=<optimized out>, type=<optimized out>) at items/qquickitem.cpp:6133
#13 0x00007f8cdc6052dc in QQuickItem::setZ (this=0x55b8b85024e0, v=<optimized out>) at items/qquickitem.cpp:5534
#14 0x00007f8cdc610ba5 in QQuickItem::qt_static_metacall (_o=_o@entry=0x55b8b85024e0, _c=_c@entry=QMetaObject::WriteProperty, _id=_id@entry=6, _a=_a@entry=0x7ffcd61cd8d0) at .moc/moc_qquickitem.cpp:959
#15 0x00007f8cdc611113 in QQuickItem::qt_metacall (this=this@entry=0x55b8b85024e0, _c=_c@entry=QMetaObject::WriteProperty, _id=6, _a=_a@entry=0x7ffcd61cd8d0) at .moc/moc_qquickitem.cpp:1037
#16 0x00007f8cdc616895 in QQuickRectangle::qt_metacall (this=0x55b8b85024e0, _c=QMetaObject::WriteProperty, _id=<optimized out>, _a=0x7ffcd61cd8d0) at .moc/moc_qquickrectangle_p.cpp:681
#17 0x00007f8cdbfcbf3e in QQmlVMEMetaObject::metaCall (this=0x55b8b85017c0, o=<optimized out>, c=QMetaObject::WriteProperty, _id=7, a=0x7ffcd61cd8d0) at qml/qqmlvmemetaobject.cpp:981
#18 0x00007f8cdbf2b9b3 in QV4::QObjectWrapper::setProperty (engine=engine@entry=0x55b8b392ea40, object=object@entry=0x55b8b85024e0, property=0x7f8cb0098f68, value=...) at jsruntime/qv4qobjectwrapper.cpp:536
#19 0x00007f8cdbf2c4ee in QV4::QObjectWrapper::setQmlProperty (engine=engine@entry=0x55b8b392ea40, qmlContext=qmlContext@entry=0x55b8b8502420, object=0x55b8b85024e0, name=<optimized out>, revisionMode=revisionMode@entry=QV4::QObjectWrapper::CheckRevision, value=...) at jsruntime/qv4qobjectwrapper.cpp:437
#20 0x00007f8cdbf01fb7 in QV4::QQmlContextWrapper::virtualPut (m=<optimized out>, id=..., value=..., receiver=<optimized out>) at jsruntime/qv4qmlcontext.cpp:431
#21 0x00007f8cdbea76b8 in QV4::Object::put (receiver=0x7f8cb62ae688, v=..., name=0x7f8cb62ae680, this=0x7f8cb62ae688) at jsruntime/qv4object_p.h:318
#22 QV4::ExecutionContext::setProperty (this=<optimized out>, name=0x7f8cb62ae680, value=...) at jsruntime/qv4context.cpp:311
#23 0x00007f8cdbfa8768 in QV4::Runtime::method_storeNameSloppy (engine=0x55b8b392ea40, nameIndex=<optimized out>, value=...) at jsruntime/qv4runtime.cpp:959
#24 0x00007f8cdbf43e31 in QV4::Moth::VME::interpret (frame=0x7ffcd61cdc60, engine=0x55b8b392ea40, code=0x7f8cbbe2a603 "\016\002") at jsruntime/qv4vme_moth.cpp:576
#25 0x00007f8cdbf48406 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffcd61cdc60, engine=engine@entry=0x55b8b392ea40) at jsruntime/qv4vme_moth.cpp:441
#26 0x00007f8cdbed752b in QV4::Function::call (this=this@entry=0x55b8b85b1550, thisObject=thisObject@entry=0x7f8cb62ae600, argv=argv@entry=0x7f8cb62ae618, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#27 0x00007f8cdc04a5f7 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x55b8b85ca010, callData=callData@entry=0x7f8cb62ae5e8, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:211
#28 0x00007f8cdbfee8e9 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x55b8b85ca010, a=a@entry=0x0) at qml/qqmlboundsignal.cpp:225
#29 0x00007f8cdbfefc6b in QQmlBoundSignal_callback (e=0x55b8b85c9fc0, a=0x0) at qml/qqmlboundsignal.cpp:358
#30 0x00007f8cdc02ac12 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:104
#31 0x00007f8cdbfd08e9 in QQmlData::signalEmitted (object=0x55b8b85024e0, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:883
#32 0x00007f8cde4cf0af in QMetaObject::activate (sender=0x55b8b85024e0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3664
#33 0x00007f8cdbfcac35 in QQmlVMEMetaObject::activate (this=this@entry=0x55b8b85017c0, object=<optimized out>, index=index@entry=50, args=args@entry=0x0) at qml/qqmlvmemetaobject.cpp:1246
#34 0x00007f8cdbfcc750 in QQmlVMEMetaObject::metaCall (this=0x55b8b85017c0, o=<optimized out>, c=<optimized out>, _id=<optimized out>, a=<optimized out>) at qml/qqmlvmemetaobject.cpp:839
#35 0x00007f8cdc054755 in QQmlPropertyData::writeProperty (flags=..., value=<optimized out>, target=<optimized out>, this=<optimized out>) at ../../include/QtQml/5.12.3/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:350
#36 GenericBinding<1>::doStore<bool> (flags=..., pd=<optimized out>, value=<optimized out>, this=<optimized out>) at qml/qqmlbinding.cpp:332
#37 GenericBinding<1>::write (this=0x55b8b85b5170, result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:296
#38 0x00007f8cdc055127 in QQmlNonbindingBinding::doUpdate (this=0x55b8b85b5170, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:249
#39 0x00007f8cdc0516f3 in QQmlBinding::update (this=0x55b8b85b5170, flags=...) at qml/qqmlbinding.cpp:185
#40 0x00007f8cdc02ac12 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:104
#41 0x00007f8cdbfd08e9 in QQmlData::signalEmitted (object=0x55b8b3942b50, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:883
#42 0x00007f8cde4cf0af in QMetaObject::activate (sender=0x55b8b3942b50, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3664
#43 0x00007f8cdbfcac35 in QQmlVMEMetaObject::activate (this=this@entry=0x55b8b396cff0, object=<optimized out>, index=index@entry=108, args=args@entry=0x0) at qml/qqmlvmemetaobject.cpp:1246
#44 0x00007f8cdbfcc750 in QQmlVMEMetaObject::metaCall (this=0x55b8b396cff0, o=<optimized out>, c=<optimized out>, _id=<optimized out>, a=<optimized out>) at qml/qqmlvmemetaobject.cpp:839
#45 0x00007f8cdc05456d in QQmlPropertyData::writeProperty (flags=..., value=<optimized out>, target=<optimized out>, this=<optimized out>) at ../../include/QtQml/5.12.3/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:350
#46 GenericBinding<2>::doStore<int> (flags=..., pd=<optimized out>, value=<optimized out>, this=<optimized out>) at qml/qqmlbinding.cpp:332
#47 GenericBinding<2>::write (this=0x55b8b6e11cb0, result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:301
#48 0x00007f8cdc055127 in QQmlNonbindingBinding::doUpdate (this=0x55b8b6e11cb0, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:249
#49 0x00007f8cdc0516f3 in QQmlBinding::update (this=0x55b8b6e11cb0, flags=...) at qml/qqmlbinding.cpp:185
#50 0x00007f8cdbf2c0e9 in QV4::QObjectWrapper::setProperty (engine=engine@entry=0x55b8b392ea40, object=object@entry=0x55b8b3942b50, property=0x7f8cb029a198, value=...) at jsruntime/qv4qobjectwrapper.cpp:482
#51 0x00007f8cdbf2c4ee in QV4::QObjectWrapper::setQmlProperty (engine=0x55b8b392ea40, qmlContext=<optimized out>, object=0x55b8b3942b50, name=<optimized out>, revisionMode=QV4::QObjectWrapper::IgnoreRevision, value=...) at jsruntime/qv4qobjectwrapper.cpp:437
#52 0x00007f8cdbf2c689 in QV4::QObjectWrapper::virtualPut (m=0x7f8cb62ae598, id=..., value=..., receiver=0x7f8cb62ae598) at jsruntime/qv4qobjectwrapper.cpp:723
#53 0x00007f8cdbea8ce9 in QV4::Object::put (receiver=0x7f8cb62ae598, v=..., name=0x7f8cb62ae5a0, this=0x7f8cb62ae5a0) at jsruntime/qv4object_p.h:318
#54 QV4::Lookup::setterFallback (l=<optimized out>, engine=0x55b8b392ea40, object=..., value=...) at jsruntime/qv4lookup.cpp:498
#55 0x00007f8cdbf43a41 in QV4::Moth::VME::interpret (frame=0x7ffcd61d1e00, engine=0x55b8b392ea40, code=0x7f8ccc014404 "\016\002") at jsruntime/qv4vme_moth.cpp:630
#56 0x00007f8cdbf48406 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffcd61d1e00, engine=engine@entry=0x55b8b392ea40) at jsruntime/qv4vme_moth.cpp:441
#57 0x00007f8cdbed752b in QV4::Function::call (this=this@entry=0x55b8b3bb5ba0, thisObject=thisObject@entry=0x7f8cb62ae4f0, argv=argv@entry=0x7f8cb62ae508, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#58 0x00007f8cdc04a5f7 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x55b8b3bcb070, callData=callData@entry=0x7f8cb62ae4d8, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:211
#59 0x00007f8cdbfee8e9 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x55b8b3bcb070, a=a@entry=0x0) at qml/qqmlboundsignal.cpp:225
#60 0x00007f8cdbfefc6b in QQmlBoundSignal_callback (e=0x55b8b3bcaff0, a=0x0) at qml/qqmlboundsignal.cpp:358
#61 0x00007f8cdc02ac12 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:104
#62 0x00007f8cdbfd08e9 in QQmlData::signalEmitted (object=0x55b8b3bc6c30, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:883
#63 0x00007f8cde4cf0af in QMetaObject::activate (sender=0x55b8b3bc6c30, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3664
#64 0x00007f8ccfda227b in QQuickContainer::setCurrentIndex(int) () from /usr/lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#65 0x00007f8ccfda29ee in QQuickContainerPrivate::removeItem(int, QQuickItem*) () from /usr/lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#66 0x00007f8cdc6064f6 in QQuickItemPrivate::itemChange (this=this@entry=0x55b8b68bbdb0, change=change@entry=QQuickItem::ItemParentHasChanged, data=...) at items/qquickitem.cpp:6286
#67 0x00007f8cdc60cf37 in QQuickItem::setParentItem (this=0x55b8b83fd170, parentItem=parentItem@entry=0x0) at items/qquickitem.cpp:2806
#68 0x00007f8cdc72f66f in QQuickRepeater::clear (this=this@entry=0x55b8b3bca510) at items/qquickrepeater.cpp:381
#69 0x00007f8cdc72f876 in QQuickRepeater::setModel (this=0x55b8b3bca510, m=...) at items/qquickrepeater.cpp:207
#70 0x00007f8cdc731985 in QQuickRepeater::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=0, _a=<optimized out>) at .moc/moc_qquickrepeater_p.cpp:224
#71 0x00007f8cdbfe3122 in QQmlPropertyData::writeProperty (this=this@entry=0x7f8cb024dc18, target=target@entry=0x55b8b3bca510, value=value@entry=0x7ffcd61d4000, flags=...) at ../../include/QtQml/5.12.3/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:346
#72 0x00007f8cdbfe06ac in QQmlPropertyPrivate::write (object=<optimized out>, property=..., value=..., context=<optimized out>, flags=...) at qml/qqmlproperty.cpp:1268
#73 0x00007f8cdbfe1aec in QQmlPropertyPrivate::writeValueProperty (object=<optimized out>, core=..., valueTypeData=..., value=..., context=<optimized out>, flags=..., flags@entry=...) at qml/qqmlproperty.cpp:1185
#74 0x00007f8cdc05283c in QQmlBinding::slowWrite (this=this@entry=0x55b8b3bc6f60, core=..., valueTypeData=..., result=..., isUndefined=isUndefined@entry=false, flags=..., flags@entry=...) at qml/qqmlbinding.cpp:459
#75 0x00007f8cdc053b38 in GenericBinding<0>::write (this=0x55b8b3bc6f60, result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:325
#76 0x00007f8cdc055127 in QQmlNonbindingBinding::doUpdate (this=0x55b8b3bc6f60, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:249
#77 0x00007f8cdc0516f3 in QQmlBinding::update (this=0x55b8b3bc6f60, flags=...) at qml/qqmlbinding.cpp:185
#78 0x00007f8cdc02ac12 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:104
#79 0x00007f8cdbfd08e9 in QQmlData::signalEmitted (object=0x55b8b37aff30, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:883
#80 0x00007f8cde4cf0af in QMetaObject::activate (sender=0x55b8b37aff30, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3664
#81 0x00007f8cde4cf98f in QtPrivate::QSlotObjectBase::call (a=0x7ffcd61d5dc0, r=0x55b8b37aff30, this=0x55b8b6d72e50) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#82 QMetaObject::activate (sender=0x55b8b8585b70, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3776
#83 0x00007f8cbbe610af in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcms/kcm_kscreen.so
#84 0x00007f8cbbe63c9f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcms/kcm_kscreen.so
#85 0x00007f8cde4cf98f in QtPrivate::QSlotObjectBase::call (a=0x7ffcd61d6090, r=0x55b8b37aff30, this=0x55b8b84041f0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#86 QMetaObject::activate (sender=0x55b8b69eac20, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3776
#87 0x00007f8cb6f2ab9f in KScreen::ConfigOperation::finished(KScreen::ConfigOperation*) () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.7
#88 0x00007f8cb6f0a648 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.7
#89 0x00007f8cde4d03e2 in QObject::event (this=0x55b8b83d7940, e=<optimized out>) at kernel/qobject.cpp:1260
#90 0x00007f8cdf52a65c in QApplicationPrivate::notify_helper (this=this@entry=0x55b8b34848c0, receiver=receiver@entry=0x55b8b83d7940, e=e@entry=0x55b8b37bb200) at kernel/qapplication.cpp:3736
#91 0x00007f8cdf531b90 in QApplication::notify (this=0x7ffcd61d6740, receiver=0x55b8b83d7940, e=0x55b8b37bb200) at kernel/qapplication.cpp:3483
#92 0x00007f8cde49fd18 in QCoreApplication::notifyInternal2 (receiver=0x55b8b83d7940, event=0x55b8b37bb200) at kernel/qcoreapplication.cpp:1060
#93 0x00007f8cde49feee in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x55b8b37bb200) at kernel/qcoreapplication.cpp:1450
#94 0x00007f8cde4a28d7 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55b8b347bff0) at kernel/qcoreapplication.cpp:1799
#95 0x00007f8cde4a2e78 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1653
#96 0x00007f8cde4fd793 in postEventSourceDispatch (s=s@entry=0x55b8b34b9c70) at kernel/qeventdispatcher_glib.cpp:276
#97 0x00007f8cd703f417 in g_main_dispatch (context=0x55b8b34c7db0) at ../../../../glib/gmain.c:3176
#98 g_main_context_dispatch (context=context@entry=0x55b8b34c7db0) at ../../../../glib/gmain.c:3829
#99 0x00007f8cd703f650 in g_main_context_iterate (context=context@entry=0x55b8b34c7db0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3902
#100 0x00007f8cd703f6dc in g_main_context_iteration (context=0x55b8b34c7db0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#101 0x00007f8cde4fcdaf in QEventDispatcherGlib::processEvents (this=0x55b8b34bcc00, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#102 0x00007f8cde49e03a in QEventLoop::exec (this=this@entry=0x7ffcd61d6660, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#103 0x00007f8cde4a7170 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1363
#104 0x000055b8b2348218 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71

Possible duplicates by query: bug 411468, bug 411378, bug 411089, bug 410786, bug 409794.

Reported using DrKonqi

Comment 1 Nate Graham 2019-09-17 16:54:54 UTC

Can reproduce

Comment 2 Roman Gilg 2019-09-18 19:54:09 UTC

Can reproduce as well. Seems to be a bug in Qt.

Comment 3 Christoph Feck 2019-12-01 14:56:58 UTC

*** Bug 413913 has been marked as a duplicate of this bug. ***

Comment 4 Patrick Silva 2020-02-19 01:45:17 UTC

Still crashing on Neon unstable edition.
open system settings in icon view mode
open display and monitor
change scale setting or select a unselected radio button on bottom
click on "All settings" in the upper left corner (system settings prompts
to save/discard change)
click on "Discard" button
system settings crashes

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.18.80
KDE Frameworks Version: 5.68.0
Qt Version: 5.14.1

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 0x7f5296b80800 (LWP 2659))]

Thread 5 (Thread 0x7f52575c9700 (LWP 2666)):
#0  0x00007f5291fa00b4 in __GI___libc_read (fd=19, buf=0x7f52575c8bde, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f525c3b1021 in pa_read () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f525c62fa2e in pa_mainloop_prepare () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f525c6304a0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f525c630560 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f525c63e3c9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f525c3e0318 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f528d9e06db in start_thread (arg=0x7f52575c9700) at pthread_create.c:463
#8  0x00007f5291fb188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f5272924700 (LWP 2662)):
#0  0x00007f528d9e69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558fc8f4a5bc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x558fc8f4a568, cond=0x558fc8f4a590) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x558fc8f4a590, mutex=0x558fc8f4a568) at pthread_cond_wait.c:655
#3  0x00007f5273640ebb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f5273640ab7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f528d9e06db in start_thread (arg=0x7f5272924700) at pthread_create.c:463
#6  0x00007f5291fb188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f527b558700 (LWP 2661)):
#0  0x00007f5291fa4bf9 in __GI___poll (fds=0x7f5274014c30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f528b6215c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f528b6216dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f529290b0db in QEventDispatcherGlib::processEvents (this=0x7f5274000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f52928aa63a in QEventLoop::exec (this=this@entry=0x7f527b557d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f52926bb317 in QThread::exec (this=this@entry=0x7f529300fda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:536
#6  0x00007f5292d97555 in QDBusConnectionManager::run (this=0x7f529300fda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#7  0x00007f52926bc7ec in QThreadPrivate::start (arg=0x7f529300fda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:342
#8  0x00007f528d9e06db in start_thread (arg=0x7f527b558700) at pthread_create.c:463
#9  0x00007f5291fb188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f52839c7700 (LWP 2660)):
#0  0x00007f5291fa4bf9 in __GI___poll (fds=0x7f52839c6ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f528d5a4747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f528d5a636a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f528659ccc0 in QXcbEventQueue::run (this=0x558fc8e400b0) at qxcbeventqueue.cpp:228
#4  0x00007f52926bc7ec in QThreadPrivate::start (arg=0x558fc8e400b0) at thread/qthread_unix.cpp:342
#5  0x00007f528d9e06db in start_thread (arg=0x7f52839c7700) at pthread_create.c:463
#6  0x00007f5291fb188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f5296b80800 (LWP 2659)):
[KCrash Handler]
#7  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator-> (this=0xb9) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:118
#8  qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > const> (ptr=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1133
#9  QQuickWindow::d_func (this=0xb1) at items/qquickwindow.h:79
#10 QQuickWindow::mouseGrabberItem (this=0xb1) at items/qquickwindow.cpp:1629
#11 0x00007f52907b0e57 in QQuickWindowPrivate::removeGrabber (this=this@entry=0x558fcc817f50, grabber=0x558fce6d6d70, mouse=mouse@entry=true, touch=touch@entry=true) at items/qquickwindow.cpp:922
#12 0x00007f529079be30 in QQuickItemPrivate::derefWindow (this=0x558fce67db70) at items/qquickitem.cpp:3079
#13 0x00007f529079e1e6 in QQuickItem::~QQuickItem (this=0x558fce6d6d70, __in_chrg=<optimized out>) at items/qquickitem.cpp:2392
#14 0x00007f52907bea9d in QQuickRectangle::~QQuickRectangle (this=0x558fce6d6d70, __in_chrg=<optimized out>) at items/qquickrectangle_p.h:156
#15 QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement (this=0x558fce6d6d70, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#16 QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement (this=0x558fce6d6d70, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#17 0x00007f52928deeb5 in QObject::event (this=this@entry=0x558fce6d6d70, e=e@entry=0x558fcc72af20) at kernel/qobject.cpp:1326
#18 0x00007f529079b45b in QQuickItem::event (this=0x558fce6d6d70, ev=0x558fcc72af20) at items/qquickitem.cpp:8156
#19 0x00007f5293a258bc in QApplicationPrivate::notify_helper (this=this@entry=0x558fc8e3c6b0, receiver=receiver@entry=0x558fce6d6d70, e=e@entry=0x558fcc72af20) at kernel/qapplication.cpp:3684
#20 0x00007f5293a2cac0 in QApplication::notify (this=0x7ffcd84819c0, receiver=0x558fce6d6d70, e=0x558fcc72af20) at kernel/qapplication.cpp:3430
#21 0x00007f52928abdb8 in QCoreApplication::notifyInternal2 (receiver=0x558fce6d6d70, event=0x558fcc72af20) at kernel/qcoreapplication.cpp:1092
#22 0x00007f52928abf8e in QCoreApplication::sendEvent (receiver=receiver@entry=0x558fce6d6d70, event=event@entry=0x558fcc72af20) at kernel/qcoreapplication.cpp:1487
#23 0x00007f52928aea31 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x558fc8e32f60) at kernel/qcoreapplication.cpp:1832
#24 0x00007f52928aefc8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1691
#25 0x00007f529290ba13 in postEventSourceDispatch (s=0x558fc8e8f820) at kernel/qeventdispatcher_glib.cpp:277
#26 0x00007f528b621417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f528b621650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f528b6216dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f529290b0bc in QEventDispatcherGlib::processEvents (this=0x558fc8e8fb90, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#30 0x00007f52928aa63a in QEventLoop::exec (this=this@entry=0x7ffcd84818b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#31 0x00007f52928b3db0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1400
#32 0x0000558fc748771e in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:101

Comment 5 Nate Graham 2020-02-24 05:00:44 UTC

*** Bug 418018 has been marked as a duplicate of this bug. ***

Comment 6 Oleg Solovyov 2020-03-13 15:26:58 UTC

the problem appears when upgrading kscreen from 5.16.5 to 5.17.0

I've done further investigation and found the following:
in kcm/package/contents/ui/Output.qml:231, when I remove maskSource from OpacityMask item, the problem vanishes (tag v5.17.0)

Problem appears after commit 6309d33

Comment 7 David Edmundson 2020-04-04 12:19:47 UTC


*** This bug has been marked as a duplicate of bug 419625 ***