Bug 401009

Summary: Crash on closing KCM after opening the install local dialog
Product: [Unmaintained] kde-gtk-config Reporter: Alexander Potashev <aspotashev>
Component: generalAssignee: Manuel Tortosa <manutortosa>
Status: RESOLVED DUPLICATE    
Severity: crash CC: aleixpol, bugseforuns
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.13.5   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Alexander Potashev 2018-11-13 15:50:16 UTC 
Application: systemsettings5 (5.13.5)

Qt Version: 5.11.1
Frameworks Version: 5.48.0
Operating System: Linux 4.18.12-200.fc28.x86_64 x86_64
Distribution: "Fedora release 28 (Twenty Eight)"

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

1. Run systemsettings
2. Open the GTK application style section
3. Click Get new styles -> Install a local theme...
4. Close the dialog
5. Go back in System Settings to close the KCM
6. When asked if you want to save changes (in fact you made no changes!), click Discard  --> CRASH!

The crash can be reproduced every time.

-- Backtrace:
Application: Параметры системы (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1af788f940 (LWP 1649599))]

Thread 12 (Thread 0x7f1a765ee700 (LWP 1655445)):
#0  0x00007f1b04030879 in syscall () at /lib64/libc.so.6
#1  0x00007f1afc8eb76e in g_cond_wait_until (cond=cond@entry=0x55f7ca22eaa8, mutex=mutex@entry=0x55f7ca22eaa0, end_time=end_time@entry=1305614505929) at gthread-posix.c:1449
#2  0x00007f1afc8770f1 in g_async_queue_pop_intern_unlocked (queue=queue@entry=0x55f7ca22eaa0, wait=wait@entry=1, end_time=end_time@entry=1305614505929) at gasyncqueue.c:422
#3  0x00007f1afc8776e0 in g_async_queue_timeout_pop (queue=0x55f7ca22eaa0, timeout=timeout@entry=15000000) at gasyncqueue.c:543
#4  0x00007f1afc8cda31 in g_thread_pool_wait_for_new_pool () at gthreadpool.c:167
#5  0x00007f1afc8cda31 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:364
#6  0x00007f1afc8ccf8a in g_thread_proxy (data=0x7f1a6c0046d0) at gthread.c:784
#7  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f1aa6b98700 (LWP 1650356)):
#0  0x00007f1b04026e54 in read () at /lib64/libc.so.6
#1  0x00007f1afc8ea0f0 in read (__nbytes=16, __buf=0x7f1aa6b97a10, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
#2  0x00007f1afc8ea0f0 in g_wakeup_acknowledge (wakeup=0x7f1ab40039a0) at gwakeup.c:210
#3  0x00007f1afc8a46bb in g_main_context_check (context=context@entry=0x7f1aa0000bf0, max_priority=2147483647, fds=fds@entry=0x7f1aa0004a00, n_fds=n_fds@entry=1) at gmain.c:3680
#4  0x00007f1afc8a4b70 in g_main_context_iterate (context=context@entry=0x7f1aa0000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3899
#5  0x00007f1afc8a4cf0 in g_main_context_iteration (context=0x7f1aa0000bf0, may_block=may_block@entry=1) at gmain.c:3963
#6  0x00007f1b04ee22ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f1aa0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f1b04e90b7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f1aa6b97c40, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#8  0x00007f1b04cf86b6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:525
#9  0x00007f1b08cb7d09 in QQmlThreadPrivate::run() (this=0x55f7c95fec40) at qml/ftw/qqmlthread.cpp:148
#10 0x00007f1b04d01b4b in QThreadPrivate::start(void*) (arg=0x55f7c95fec40) at thread/qthread_unix.cpp:367
#11 0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#12 0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f1acf7fe700 (LWP 1649612)):
#0  0x00007f1afc8eb50d in g_mutex_lock (mutex=mutex@entry=0x7f1ab4000bf0) at gthread-posix.c:1343
#1  0x00007f1afc8a475a in g_main_context_dispatch (context=context@entry=0x7f1ab4000bf0) at gmain.c:3823
#2  0x00007f1afc8a4c58 in g_main_context_iterate (context=context@entry=0x7f1ab4000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3902
#3  0x00007f1afc8a4cf0 in g_main_context_iteration (context=0x7f1ab4000bf0, may_block=may_block@entry=1) at gmain.c:3963
#4  0x00007f1b04ee22ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f1ab4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f1b04e90b7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f1acf7fdc30, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#6  0x00007f1b04cf86b6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f1b0513a7b9 in QDBusConnectionManager::run() (this=0x7f1b051b6060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f1b04d01b4b in QThreadPrivate::start(void*) (arg=0x7f1b051b6060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:367
#9  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f1ad5ffb700 (LWP 1649611)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef5018, cond=0x55f7c8ef5040) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef5018) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4f70) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f1ad67fc700 (LWP 1649610)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4eb0, cond=0x55f7c8ef4ed8) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4eb0) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4e08) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f1ad6ffd700 (LWP 1649609)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4d48, cond=0x55f7c8ef4d70) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4d48) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4ca0) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f1acffff700 (LWP 1649608)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4be0, cond=0x55f7c8ef4c08) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4be0) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4b38) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f1ad77fe700 (LWP 1649607)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4a78, cond=0x55f7c8ef4aa0) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4a78) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef49d0) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f1ad7fff700 (LWP 1649606)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4910, cond=0x55f7c8ef4938) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4910) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4868) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f1adca24700 (LWP 1649605)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef47a8, cond=0x55f7c8ef47d0) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef47a8) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4700) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f1add225700 (LWP 1649604)):
#0  0x00007f1b020a951c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1ae1fe50c3 in cnd_wait (mtx=0x55f7c8ef4640, cond=0x55f7c8ef4668) at ../../../../include/c11/threads_posix.h:155
#2  0x00007f1ae1fe50c3 in pipe_semaphore_wait (sema=0x55f7c8ef4640) at ../../../../src/gallium/auxiliary/os/os_thread.h:108
#3  0x00007f1ae1fe50c3 in thread_function (init_data=init_data@entry=0x55f7c8ef4598) at lp_rast.c:809
#4  0x00007f1ae1fe500b in impl_thrd_routine (p=<optimized out>) at ../../../../include/c11/threads_posix.h:87
#5  0x00007f1b020a3594 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b04035e6f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1af788f940 (LWP 1649599)):
[KCrash Handler]
#6  0x00007f1b059a9f4a in qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at widgets/qdialogbuttonbox.h:159
#7  0x00007f1b059a9f4a in QDialogButtonBox::d_func() const (this=0xe0) at widgets/qdialogbuttonbox.h:159
#8  0x00007f1b059a9f4a in QDialogButtonBox::button(QDialogButtonBox::StandardButton) const (this=0xe0, which=QDialogButtonBox::Close) at widgets/qdialogbuttonbox.cpp:829
#9  0x00007f1aab12d9d7 in DialogInstaller::enableGUIThemeIconInstaller() () at /usr/lib64/qt5/plugins/kcm_kdegtkconfig.so
#10 0x00007f1b04eb9f43 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fff8ef46d20, r=0x7f1ae400f5b0, this=0x55f7c9b67210) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:376
#11 0x00007f1b04eb9f43 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x55f7c9b65fe0, signalOffset=<optimized out>, local_signal_index=0, argv=0x7fff8ef46d20) at kernel/qobject.cpp:3754
#12 0x00007f1b04eba4ab in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x55f7c9b65fe0, m=m@entry=0x7f1b06463e20 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff8ef46d20) at kernel/qobject.cpp:3633
#13 0x00007f1b0620f6fd in KJob::finished(KJob*, KJob::QPrivateSignal) (this=this@entry=0x55f7c9b65fe0, _t1=<optimized out>, _t1@entry=0x55f7c9b65fe0, _t2=...) at /usr/src/debug/kf5-kcoreaddons-5.48.0-2.fc28.x86_64/x86_64-redhat-linux-gnu/src/lib/KF5CoreAddons_autogen/include/moc_kjob.cpp:548
#14 0x00007f1b0620fe58 in KJob::~KJob() (this=0x55f7c9b65fe0, __in_chrg=<optimized out>) at /usr/src/debug/kf5-kcoreaddons-5.48.0-2.fc28.x86_64/src/lib/jobs/kjob.cpp:60
#15 0x00007f1aab133dc4 in Thread::~Thread() () at /usr/lib64/qt5/plugins/kcm_kdegtkconfig.so
#16 0x00007f1aab12ee16 in DialogInstaller::~DialogInstaller() () at /usr/lib64/qt5/plugins/kcm_kdegtkconfig.so
#17 0x00007f1aab12ee4d in DialogInstaller::~DialogInstaller() () at /usr/lib64/qt5/plugins/kcm_kdegtkconfig.so
#18 0x00007f1b04ec019c in QObjectPrivate::deleteChildren() (this=0x55f7cb220350) at kernel/qobject.cpp:1997
#19 0x00007f1b05859e76 in QWidget::~QWidget() (this=0x55f7ca59f5d0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1705
#20 0x00007f1b08013097 in KCModule::~KCModule() (this=0x55f7ca59f5d0, __in_chrg=<optimized out>) at /usr/src/debug/kf5-kconfigwidgets-5.48.0-2.fc28.x86_64/src/kcmodule.cpp:183
#21 0x00007f1aab123efd in GTKConfigKCModule::~GTKConfigKCModule() () at /usr/lib64/qt5/plugins/kcm_kdegtkconfig.so
#22 0x00007f1b09a0ff78 in KCModuleProxy::deleteClient() () at /lib64/libKF5KCMUtils.so.5
#23 0x00007f1b09a10033 in KCModuleProxy::~KCModuleProxy() () at /lib64/libKF5KCMUtils.so.5
#24 0x00007f1b09a101ed in KCModuleProxy::~KCModuleProxy() () at /lib64/libKF5KCMUtils.so.5
#25 0x00007f1b04ec019c in QObjectPrivate::deleteChildren() (this=0x55f7c9d810c0) at kernel/qobject.cpp:1997
#26 0x00007f1b05859e76 in QWidget::~QWidget() (this=0x55f7cb292bf0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1705
#27 0x00007f1b0585a07d in QWidget::~QWidget() (this=0x55f7cb292bf0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1564
#28 0x00007f1b04ec019c in QObjectPrivate::deleteChildren() (this=0x55f7c9dd5980) at kernel/qobject.cpp:1997
#29 0x00007f1b05859e76 in QWidget::~QWidget() (this=0x55f7cb292c30, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1705
#30 0x00007f1b059ac40d in QScrollArea::~QScrollArea() (this=0x55f7cb292c30, __in_chrg=<optimized out>) at widgets/qscrollarea.cpp:170
#31 0x00007f1b06f00eff in KPageWidgetItem::Private::~Private() (this=0x55f7ca2d1dc0, __in_chrg=<optimized out>) at /usr/include/c++/8/bits/atomic_base.h:82
#32 0x00007f1b06f00eff in KPageWidgetItem::~KPageWidgetItem() (this=0x55f7ca29c340, __in_chrg=<optimized out>) at /usr/src/debug/kf5-kwidgetsaddons-5.48.0-2.fc28.x86_64/src/kpagewidgetmodel.cpp:88
#33 0x00007f1b06f00fdd in KPageWidgetItem::~KPageWidgetItem() (this=0x55f7ca29c340, __in_chrg=<optimized out>) at /usr/src/debug/kf5-kwidgetsaddons-5.48.0-2.fc28.x86_64/src/kpagewidgetmodel.cpp:86
#34 0x00007f1b06f01a0f in PageItem::~PageItem() (this=0x55f7ca9822d0, __in_chrg=<optimized out>) at /usr/src/debug/kf5-kwidgetsaddons-5.48.0-2.fc28.x86_64/src/kpagewidgetmodel.cpp:178
#35 0x00007f1b06f0261a in KPageWidgetModel::removePage(KPageWidgetItem*) (this=0x55f7c901d7b0, item=<optimized out>) at /usr/src/debug/kf5-kwidgetsaddons-5.48.0-2.fc28.x86_64/src/kpagewidgetmodel.cpp:539
#36 0x00007f1b09e5975d in ModuleView::closeModules() () at /lib64/libsystemsettingsview.so.3
#37 0x00007f1aac8a041e in IconMode::backToOverview() () at /usr/lib64/qt5/plugins/icon_mode.so
#38 0x00007f1b04eb9e1e in QMetaObject::activate(QObject*, int, int, void**) (sender=0x55f7c9165810, signalOffset=<optimized out>, local_signal_index=1, argv=0x7fff8ef472a0) at kernel/qobject.cpp:3771
#39 0x00007f1b04eba4ab in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x55f7c9165810, m=m@entry=0x7f1b05d00e20 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff8ef472a0) at kernel/qobject.cpp:3633
#40 0x00007f1b05818c26 in QAction::triggered(bool) (this=this@entry=0x55f7c9165810, _t1=<optimized out>) at .moc/moc_qaction.cpp:376
#41 0x00007f1b0581b2f0 in QAction::activate(QAction::ActionEvent) (this=0x55f7c9165810, event=<optimized out>) at kernel/qaction.cpp:1167
#42 0x00007f1b05908f01 in QAbstractButtonPrivate::click() (this=0x55f7c912ef20) at widgets/qabstractbutton.cpp:397
#43 0x00007f1b05909135 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) (this=0x55f7c90aca00, e=0x7fff8ef47760) at widgets/qabstractbutton.cpp:1011
#44 0x00007f1b059f6ffe in QToolButton::mouseReleaseEvent(QMouseEvent*) (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:622
#45 0x00007f1b0585e5c8 in QWidget::event(QEvent*) (this=0x55f7c90aca00, event=0x7fff8ef47760) at kernel/qwidget.cpp:8919
#46 0x00007f1b0590a38b in QAbstractButton::event(QEvent*) (this=this@entry=0x55f7c90aca00, e=e@entry=0x7fff8ef47760) at widgets/qabstractbutton.cpp:968
#47 0x00007f1b059f70a7 in QToolButton::event(QEvent*) (this=0x55f7c90aca00, event=0x7fff8ef47760) at widgets/qtoolbutton.cpp:985
#48 0x00007f1b0581f475 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55f7c90aca00, e=0x7fff8ef47760) at kernel/qapplication.cpp:3727
#49 0x00007f1b05826dd8 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3203
#50 0x00007f1b04e91c36 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f7c90aca00, event=0x7fff8ef47760) at kernel/qcoreapplication.cpp:1048
#51 0x00007f1b058260cd in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) (receiver=0x55f7c90aca00, event=0x7fff8ef47760, alienWidget=0x55f7c90aca00, nativeWidget=0x55f7c8f36c10, buttonDown=0x7f1b05d30310 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#52 0x00007f1b05879368 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () at /usr/include/c++/8/bits/atomic_base.h:82
#53 0x00007f1b0587bf0e in QWidgetWindow::event(QEvent*) (this=0x55f7c90ae410, event=0x7fff8ef47b40) at kernel/qwidgetwindow.cpp:281
#54 0x00007f1b0581f475 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55f7c90ae410, e=0x7fff8ef47b40) at kernel/qapplication.cpp:3727
#55 0x00007f1b05826b90 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3486
#56 0x00007f1b04e91c36 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f7c90ae410, event=0x7fff8ef47b40) at kernel/qcoreapplication.cpp:1048
#57 0x00007f1b052caf43 in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (event=0x7fff8ef47b40, receiver=0x55f7c90ae410) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:237
#58 0x00007f1b052caf43 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) (e=0x55f7ca2a3c20) at kernel/qguiapplication.cpp:2081
#59 0x00007f1b052cd085 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) (e=0x55f7ca2a3c20) at kernel/qguiapplication.cpp:1816
#60 0x00007f1b052a846b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=...) at kernel/qwindowsysteminterface.cpp:1032
#61 0x00007f1aeafdb7cf in QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55f7c8e96340, flags=...) at qeventdispatcher_glib.cpp:70
#62 0x00007f1b04e90b7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fff8ef47dc0, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#63 0x00007f1b04e98c46 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1336
#64 0x000055f7c89bb1f4 in main ()

Reported using DrKonqi
Comment 1 Kai Uwe Broulik 2019-01-23 08:18:32 UTC 
*** Bug 403520 has been marked as a duplicate of this bug. ***
Comment 2 Aleix Pol 2019-03-05 02:10:11 UTC 

*** This bug has been marked as a duplicate of bug 398112 ***