https://bugs.kde.org/show_bug.cgi?id=385289
--- Comment #5 from Andrius Štikonas <andr...@stikonas.eu> ---
Ok, I obtained the following backtrace with breakpoint on exit
Thread 1 (Thread 0x7fffbccec8c0 (LWP 11595)):
#0 0x00007ffff1f7644d in write () from /lib64/libc.so.6
#1 0x00007fffdd7f0746 in g_wakeup_signal (wakeup=0x6418c0) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gwakeup.c:239
#2 0x00007fffdd79aa15 in g_main_context_wakeup (context=0x7fffac000990) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:4578
#3 0x00007ffff2ecee95 in QEventDispatcherGlib::wakeUp (this=0x7fffac0008c0) at
kernel/qeventdispatcher_glib.cpp:592
#4 0x00007ffff2e4badb in QCoreApplication::postEvent (receiver=0x7fffac0032f0,
event=0x4267dc0, priority=0) at kernel/qcoreapplication.cpp:1465
#5 0x00007ffff2e8e0fd in QMetaObject::activate (sender=0x7fff24029200,
signalOffset=0, local_signal_index=0, argv=0x7fffffffb0a0) at
kernel/qobject.cpp:3732
#6 0x00007ffff2e8db1e in QMetaObject::activate (sender=0x7fff24029200,
m=0x7ffff314fd20 <QObject::staticMetaObject>, local_signal_index=0,
argv=0x7fffffffb0a0) at kernel/qobject.cpp:3628
#7 0x00007ffff2e910bc in QObject::destroyed (this=0x7fff24029200,
_t1=0x7fff24029200) at .moc/moc_qobject.cpp:215
#8 0x00007ffff2e871e8 in QObject::~QObject (this=0x7fff24029200,
__in_chrg=<optimized out>) at kernel/qobject.cpp:901
#9 0x00007ffff7f140b9 in QDBusServiceWatcher::~QDBusServiceWatcher() () from
/usr/lib64/libQt5DBus.so.5
#10 0x00007ffff2e89197 in QObjectPrivate::deleteChildren (this=0x7fff24038fd0)
at kernel/qobject.cpp:1992
#11 0x00007ffff2e87736 in QObject::~QObject (this=0x7fff24038ee0,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1022
#12 0x00007ffff5d0bb9d in ?? () from /usr/lib64/libKF5KIOCore.so.5
#13 0x00007ffff5d0bcc1 in KSslCertificateManager::~KSslCertificateManager() ()
from /usr/lib64/libKF5KIOCore.so.5
#14 0x00007ffff5d0bce9 in ?? () from /usr/lib64/libKF5KIOCore.so.5
#15 0x00007ffff1ed0b98 in ?? () from /lib64/libc.so.6
#16 0x00007ffff1ed0be5 in exit () from /lib64/libc.so.6
#17 0x00007fffb6239eb8 in QtWaylandClient::QWaylandDisplay::exitWithError
(this=0x66d610) at qwaylanddisplay.cpp:209
#18 0x00007fffb6239e50 in QtWaylandClient::QWaylandDisplay::flushRequests
(this=0x66d610) at qwaylanddisplay.cpp:192
#19 0x00007fffb626f02e in QtWaylandClient::QWaylandDisplay::qt_static_metacall
(_o=0x66d610, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffb4e0) at
.moc/moc_qwaylanddisplay_p.cpp:76
#20 0x00007ffff2e8e328 in QMetaObject::activate (sender=0x6f7ac0,
signalOffset=3, local_signal_index=0, argv=0x7fffffffb4e0) at
kernel/qobject.cpp:3766
#21 0x00007ffff2e8db1e in QMetaObject::activate (sender=0x6f7ac0,
m=0x7ffff3157f00 <QSocketNotifier::staticMetaObject>, local_signal_index=0,
argv=0x7fffffffb4e0) at kernel/qobject.cpp:3628
#22 0x00007ffff2e9a2cd in QSocketNotifier::activated (this=0x6f7ac0, _t1=3,
_t2=...) at .moc/moc_qsocketnotifier.cpp:137
---Type <return> to continue, or q <return> to quit---
#23 0x00007ffff2e9a003 in QSocketNotifier::event (this=0x6f7ac0,
e=0x7fffffffba20) at kernel/qsocketnotifier.cpp:266
#24 0x00007ffff3931bfc in QApplicationPrivate::notify_helper (this=0x647280,
receiver=0x6f7ac0, e=0x7fffffffba20) at kernel/qapplication.cpp:3722
#25 0x00007ffff392ef9d in QApplication::notify (this=0x7fffffffd3c0,
receiver=0x6f7ac0, e=0x7fffffffba20) at kernel/qapplication.cpp:3094
#26 0x00007ffff2e4ae9f in QCoreApplication::notifyInternal2 (receiver=0x6f7ac0,
event=0x7fffffffba20) at kernel/qcoreapplication.cpp:1018
#27 0x00007ffff2e4f86e in QCoreApplication::sendEvent (receiver=0x6f7ac0,
event=0x7fffffffba20) at kernel/qcoreapplication.h:233
#28 0x00007ffff2ecdc90 in socketNotifierSourceDispatch (source=0x68b8e0) at
kernel/qeventdispatcher_glib.cpp:106
#29 0x00007fffdd798cf3 in g_main_dispatch (context=0x6aae10) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3203
#30 0x00007fffdd799c07 in g_main_context_dispatch (context=0x6aae10) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3856
#31 0x00007fffdd799dfa in g_main_context_iterate (context=0x6aae10, block=1,
dispatch=1, self=0x6cb000) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3929
#32 0x00007fffdd799ed2 in g_main_context_iteration (context=0x6aae10,
may_block=1) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3990
#33 0x00007ffff2ece9f8 in QEventDispatcherGlib::processEvents (this=0x681d20,
flags=...) at kernel/qeventdispatcher_glib.cpp:423
#34 0x00007fffb6284ae6 in QPAEventDispatcherGlib::processEvents (this=0x681d20,
flags=...) at qeventdispatcher_glib.cpp:122
#35 0x00007ffff2e47cbc in QEventLoop::processEvents (this=0x42f2710, flags=...)
at kernel/qeventloop.cpp:134
#36 0x00007ffff2e47fbd in QEventLoop::exec (this=0x42f2710, flags=...) at
kernel/qeventloop.cpp:212
#37 0x00007ffff32765bd in QBasicDrag::drag (this=0x689b80, o=0x4152990) at
kernel/qsimpledrag.cpp:195
#38 0x00007ffff329a3cb in QDragManager::drag (this=0xab6de0, o=0x4152990) at
kernel/qdnd.cpp:141
#39 0x00007ffff3299155 in QDrag::exec (this=0x4152990, supportedActions=...,
defaultDropAction=Qt::IgnoreAction) at kernel/qdrag.cpp:284
#40 0x00007ffff3298ff1 in QDrag::exec (this=0x4152990, supportedActions=...) at
kernel/qdrag.cpp:240
#41 0x00007ffff17d029d in MessageList::Widget::viewStartDragRequest() () from
/usr/lib64/libKF5MessageList.so.5
#42 0x00007ffff397a115 in QWidget::event (this=0xb82f90, event=0x7fffffffc8b0)
at kernel/qwidget.cpp:8810
#43 0x00007ffff3a69815 in QFrame::event (this=0xb82f90, e=0x7fffffffc8b0) at
widgets/qframe.cpp:550
#44 0x00007ffff3a754e2 in QAbstractScrollArea::viewportEvent (this=0xb82f90,
e=0x7fffffffc8b0) at widgets/qabstractscrollarea.cpp:1208
#45 0x00007ffff3c4bc91 in QAbstractItemView::viewportEvent (this=0xb82f90,
event=0x7fffffffc8b0) at itemviews/qabstractitemview.cpp:1748
#46 0x00007ffff3cd797c in QTreeView::viewportEvent (this=0xb82f90,
event=0x7fffffffc8b0) at itemviews/qtreeview.cpp:1312
#47 0x00007ffff3a768f7 in QAbstractScrollAreaPrivate::viewportEvent
(this=0xb75290, event=0x7fffffffc8b0) at widgets/qabstractscrollarea_p.h:112
#48 0x00007ffff3a769e2 in QAbstractScrollAreaFilter::eventFilter
(this=0xb5cca0, o=0xb6adc0, e=0x7fffffffc8b0) at
widgets/qabstractscrollarea_p.h:128
#49 0x00007ffff2e4b23f in
QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=0xb6adc0,
event=0x7fffffffc8b0) at kernel/qcoreapplication.cpp:1129
#50 0x00007ffff3931bd3 in QApplicationPrivate::notify_helper (this=0x647280,
receiver=0xb6adc0, e=0x7fffffffc8b0) at kernel/qapplication.cpp:3718
#51 0x00007ffff392f6ce in QApplication::notify (this=0x7fffffffd3c0,
receiver=0xb6adc0, e=0x7fffffffc8b0) at kernel/qapplication.cpp:3198
#52 0x00007ffff2e4ae9f in QCoreApplication::notifyInternal2 (receiver=0xb6adc0,
event=0x7fffffffc8b0) at kernel/qcoreapplication.cpp:1018
#53 0x00007ffff39349ec in QCoreApplication::sendSpontaneousEvent
(receiver=0xb6adc0, event=0x7fffffffc8b0) at
../../src/corelib/kernel/qcoreapplication.h:236
#54 0x00007ffff392e0f7 in QApplicationPrivate::sendMouseEvent
(receiver=0xb6adc0, event=0x7fffffffc8b0, alienWidget=0xb6adc0,
nativeWidget=0xad0140, buttonDown=0x7ffff3fe2c80 <qt_button_down>,
lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2702
#55 0x00007ffff39a98a6 in QWidgetWindow::handleMouseEvent (this=0xad0ba0,
event=0x7fffffffce80) at kernel/qwidgetwindow.cpp:622
#56 0x00007ffff39a8252 in QWidgetWindow::event (this=0xad0ba0,
event=0x7fffffffce80) at kernel/qwidgetwindow.cpp:243
#57 0x00007ffff3931bfc in QApplicationPrivate::notify_helper (this=0x647280,
receiver=0xad0ba0, e=0x7fffffffce80) at kernel/qapplication.cpp:3722
#58 0x00007ffff392ef9d in QApplication::notify (this=0x7fffffffd3c0,
receiver=0xad0ba0, e=0x7fffffffce80) at kernel/qapplication.cpp:3094
#59 0x00007ffff2e4ae9f in QCoreApplication::notifyInternal2 (receiver=0xad0ba0,
event=0x7fffffffce80) at kernel/qcoreapplication.cpp:1018
#60 0x00007ffff3285cb2 in QCoreApplication::sendSpontaneousEvent
(receiver=0xad0ba0, event=0x7fffffffce80) at
../../src/corelib/kernel/qcoreapplication.h:236
#61 0x00007ffff327dff8 in QGuiApplicationPrivate::processMouseEvent
(e=0x40b0450) at kernel/qguiapplication.cpp:1949
#62 0x00007ffff327d3df in QGuiApplicationPrivate::processWindowSystemEvent
(e=0x40b0450) at kernel/qguiapplication.cpp:1733
#63 0x00007ffff325dcfd in QWindowSystemInterface::sendWindowSystemEvents
(flags=...) at kernel/qwindowsysteminterface.cpp:939
#64 0x00007fffb62848d2 in userEventSourceDispatch (source=0x6ff590) at
qeventdispatcher_glib.cpp:77
#65 0x00007fffdd798cf3 in g_main_dispatch (context=0x6aae10) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3203
#66 0x00007fffdd799c07 in g_main_context_dispatch (context=0x6aae10) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3856
#67 0x00007fffdd799dfa in g_main_context_iterate (context=0x6aae10, block=1,
dispatch=1, self=0x6cb000) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3929
#68 0x00007fffdd799ed2 in g_main_context_iteration (context=0x6aae10,
may_block=1) at
/usr/src/debug/dev-libs/glib-2.50.3-r1/glib-2.50.3/glib/gmain.c:3990
#69 0x00007ffff2ece9f8 in QEventDispatcherGlib::processEvents (this=0x681d20,
flags=...) at kernel/qeventdispatcher_glib.cpp:423
#70 0x00007fffb6284ae6 in QPAEventDispatcherGlib::processEvents (this=0x681d20,
flags=...) at qeventdispatcher_glib.cpp:122
#71 0x00007ffff2e47cbc in QEventLoop::processEvents (this=0x7fffffffd2f0,
flags=...) at kernel/qeventloop.cpp:134
#72 0x00007ffff2e47fbd in QEventLoop::exec (this=0x7fffffffd2f0, flags=...) at
kernel/qeventloop.cpp:212
#73 0x00007ffff2e4b635 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1291
---Type <return> to continue, or q <return> to quit---
#74 0x00007ffff327d200 in QGuiApplication::exec () at
kernel/qguiapplication.cpp:1679
#75 0x00007ffff392e957 in QApplication::exec () at kernel/qapplication.cpp:2910
#76 0x00000000004047c0 in main (argc=1, argv=0x7fffffffd5d8) at
/usr/src/debug/kde-apps/kmail-17.08.2/kmail-17.08.2/src/main.cpp:157
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