https://bugs.kde.org/show_bug.cgi?id=397131
Bug ID: 397131
Summary: kmail crash due to
MonitorPrivate::emitItemsNotification accessing empty
items
Product: Akonadi
Version: GIT (master)
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: kdepim-b...@kde.org
Reporter: kol...@aon.at
Target Milestone: ---
I see kmail crashing after todays update (akonadi @
f7ce8ab4af83b8a64e97e2a8f11c21674cde826c)
The problem is in akonadis MonitorPrivate::emitItemsNotification
implementation, which gets called in line 555 via
if (!items.isEmpty() || itemNtf.operation() ==
Protocol::ItemChangeNotification::Remove || !fetchItems()) {
someoneWasListening = emitItemsNotification(itemNtf, items, parent,
destParent);
}
so obviously items CAN be empty (which it is in the crash case), but
emitItemsNotification()
in line 1064 (and others) uses
case Protocol::ItemChangeNotification::Add:
return emitToListeners(&Monitor::itemAdded, its.first(), col);
and Qt asserts due to the first() call on the empty list.
The stack I have here is:
1 raise
0x7fa2fad6df67
2 abort
0x7fa2fad6f33a
3 qt_message_fatal qlogging.cpp
1842 0x7fa2fba08f1c
4 QMessageLogger::fatal qlogging.cpp
880 0x7fa2fba08f1c
5 qt_assert qglobal.cpp
3188 0x7fa2fba08576
6 QVector<Akonadi::Item>::first qvector.h
237 0x7fa2f48bb98e
7 Akonadi::MonitorPrivate::emitItemsNotification monitor_p.cpp
1064 0x7fa2f48b0f90
8 Akonadi::MonitorPrivate::emitNotification monitor_p.cpp
555 0x7fa2f48ae94c
9 Akonadi::MonitorPrivate::dispatchNotifications monitor_p.cpp
1000 0x7fa2f48b58c5
10 Akonadi::MonitorPrivate::slotNotify monitor_p.cpp
969 0x7fa2f48b532a
11 Akonadi::MonitorPrivate::handleCommands monitor_p.cpp
864 0x7fa2f48b4963
12 Akonadi::Monitor::qt_static_metacall moc_monitor.cpp
338 0x7fa2f48a18b3
13 QObject::event qobject.cpp
1251 0x7fa2fbc07f76
14 QApplicationPrivate::notify_helper qapplication.cpp
3728 0x7fa2fc9821ac
15 QApplication::notify qapplication.cpp
3487 0x7fa2fc988b52
16 QCoreApplication::notifyInternal2 qcoreapplication.cpp
1048 0x7fa2fbbdc8f5
17 QCoreApplication::sendEvent qcoreapplication.h
234 0x7fa2fbbdf2be
18 QCoreApplicationPrivate::sendPostedEvents qcoreapplication.cpp
1745 0x7fa2fbbdf2be
19 QEventDispatcherUNIX::processEvents qeventdispatcher_unix.cpp
466 0x7fa2fbc2c5c4
20 QUnixEventDispatcherQPA::processEvents qunixeventdispatcher.cpp 68
0x7fa2d1fbc34d
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