I'm getting identical backtraces from KMix, Konversation, etc.: Application: KMix (kmix), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7fc0340b5800 (LWP 2243))] Thread 2 (Thread 0x7fc02b0d3700 (LWP 2244)): #0 0x00007fc03ff0a1dd in poll () from /lib64/libc.so.6 #1 0x00007fc03d863142 in _xcb_conn_wait () from /lib64/libxcb.so.1 #2 0x00007fc03d864ccf in xcb_wait_for_event () from /lib64/libxcb.so.1 #3 0x00007fc02da6dbd7 in QXcbEventReader::run (this=0x8eab60) at qxcbconnection.cpp:1089 #4 0x00007fc04152d885 in QThreadPrivate::start (arg=0x8eab60) at thread/qthread_unix.cpp:337 #5 0x00007fc03dfff52a in start_thread () from /lib64/libpthread.so.0 #6 0x00007fc03ff1577d in clone () from /lib64/libc.so.6 Thread 1 (Thread 0x7fc0340b5800 (LWP 2243)): [KCrash Handler] #6 0x00007fc04178b266 in QObject::thread (this=0xd33220) at kernel/qobject.cpp:1412 #7 0x00007fc04178a13a in QObject::QObject (this=0xdd1220, parent=0xd33220) at kernel/qobject.cpp:808 #8 0x00007fc03eb0bc6c in DBusMenuExporter::DBusMenuExporter (this=0xdd1220, objectPath=..., menu=0xd33220, _connection=...) at /home/sho/devel/src/libdbusmenu-qt/src/dbusmenuexporter.cpp:331 #9 0x00007fc045f4cd08 in KDBusMenuExporter::KDBusMenuExporter (this=0xdd1220, dbusObjectPath=..., menu=0xd33220, dbusConnection=...) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:59 #10 0x00007fc045f484fd in KStatusNotifierItem::setContextMenu (this=0xcb5c10, menu=0xd33220) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:423 #11 0x00007fc02a4ae41c in KDEPlatformSystemTrayIcon::updateMenu (this=0xd012f0, menu=0xa97810) at /home/sho/devel/src/frameworks/frameworkintegration/src/platformtheme/kdeplatformsystemtrayicon.cpp:296 #12 0x00007fc042699d6c in QSystemTrayIconPrivate::updateMenu_sys_qpa (this=0xd05c70) at util/qsystemtrayicon.cpp:712 #13 0x00007fc0426bacde in QSystemTrayIconPrivate::updateMenu_sys (this=0xd05c70) at util/qsystemtrayicon_x11.cpp:305 #14 0x00007fc042697c89 in QSystemTrayIcon::setContextMenu (this=0xc84f30, menu=0xb89900) at util/qsystemtrayicon.cpp:166 #15 0x00007fc045f4842d in KStatusNotifierItem::setContextMenu (this=0xb84490, menu=0xb89900) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:411 #16 0x00007fc045f4a5b1 in KStatusNotifierItemPrivate::setLegacySystemTrayEnabled (this=0xb84710, enabled=true) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:843 #17 0x00007fc045f4a27a in KStatusNotifierItemPrivate::setLegacyMode (this=0xb84710, legacy=true) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:788 #18 0x00007fc045f4a237 in KStatusNotifierItemPrivate::checkForRegisteredHosts (this=0xb84710) at /home/sho/devel/src/frameworks/knotifications/src/kstatusnotifieritem.cpp:781 #19 0x00007fc045f4b33f in KStatusNotifierItem::qt_static_metacall (_o=0xb84490, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0x7fff3abf8b80) at /home/sho/devel/build/frameworks/knotifications/src/moc_kstatusnotifieritem.cpp:184 #20 0x00007fc0417918df in QMetaObject::activate (sender=0xb90330, signalOffset=3, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3716 #21 0x00007fc0417910f0 in QMetaObject::activate (sender=0xb90330, m=0x7fc046182fa0 <OrgKdeStatusNotifierWatcherInterface::staticMetaObject>, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3582 #22 0x00007fc045f64067 in OrgKdeStatusNotifierWatcherInterface::StatusNotifierHostUnregistered (this=0xb90330) at /home/sho/devel/build/frameworks/knotifications/src/statusnotifierwatcher_interface.moc:222 #23 0x00007fc045f63c0b in OrgKdeStatusNotifierWatcherInterface::qt_static_metacall (_o=0xb90330, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff3abf8d50) at /home/sho/devel/build/frameworks/knotifications/src/statusnotifierwatcher_interface.moc:108 #24 0x00007fc045f63ee3 in OrgKdeStatusNotifierWatcherInterface::qt_metacall (this=0xb90330, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff3abf8d50) at /home/sho/devel/build/frameworks/knotifications/src/statusnotifierwatcher_interface.moc:173 #25 0x00007fc0479359bf in QDBusConnectionPrivate::deliverCall (this=0x8cf020, object=0xb90330, msg=..., metaTypes=..., slotIdx=7) at qdbusintegrator.cpp:990 #26 0x00007fc0479401cd in QDBusCallDeliveryEvent::placeMetaCall (this=0xd05570, object=0xb90330) at qdbusintegrator_p.h:95 #27 0x00007fc04178aea4 in QObject::event (this=0xb90330, e=0xd05570) at kernel/qobject.cpp:1245 #28 0x00007fc042276ff0 in QApplicationPrivate::notify_helper (this=0x8df360, receiver=0xb90330, e=0xd05570) at kernel/qapplication.cpp:3722 #29 0x00007fc042274760 in QApplication::notify (this=0x8ce680, receiver=0xb90330, e=0xd05570) at kernel/qapplication.cpp:3164 #30 0x00007fc04174e47e in QCoreApplication::notifyInternal (this=0x8ce680, receiver=0xb90330, event=0xd05570) at kernel/qcoreapplication.cpp:932 #31 0x00007fc0417520df in QCoreApplication::sendEvent (receiver=0xb90330, event=0xd05570) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228 #32 0x00007fc04174f7b7 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8c4d00) at kernel/qcoreapplication.cpp:1536 #33 0x00007fc04174f166 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1394 #34 0x00007fc0417c6fd0 in postEventSourceDispatch (s=0x92e790) at kernel/qeventdispatcher_glib.cpp:271 #35 0x00007fc040a49afb in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #36 0x00007fc040a49e98 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0 #37 0x00007fc040a49f4c in g_main_context_iteration () from /lib64/libglib-2.0.so.0 #38 0x00007fc0417c778b in QEventDispatcherGlib::processEvents (this=0x921a50, flags=...) at kernel/qeventdispatcher_glib.cpp:418 #39 0x00007fc02daae644 in QPAEventDispatcherGlib::processEvents (this=0x921a50, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:115 #40 0x00007fc04174b122 in QEventLoop::processEvents (this=0x7fff3abf9c80, flags=...) at kernel/qeventloop.cpp:128 #41 0x00007fc04174b3fb in QEventLoop::exec (this=0x7fff3abf9c80, flags=...) at kernel/qeventloop.cpp:204 #42 0x00007fc04174eb58 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1185 #43 0x00007fc041b36d24 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1532 #44 0x00007fc042273f8d in QApplication::exec () at kernel/qapplication.cpp:2956 #45 0x00007fc0475b06e8 in kdemain (argc=5, argv=0x7fff3abfa288) at /home/sho/devel/src/kde/kdemultimedia/kmix/apps/main.cpp:91 #46 0x0000000000400be8 in main (argc=5, argv=0x7fff3abfa288) at /home/sho/devel/build/kde/kdemultimedia/kmix/kmix_dummy.cpp:3 Reproducible: Always
Version info: Qt 5.4 branch tip, KF5 master branch tip. Possibly related to bug 335284.
Possibly related to the recent changes of KSNI :S
When is it crashing? Or how to reproduce this crash?
Just kquitapp5 is enough for me. But I just realized that I use wmsystray for ibus, so KSNI probably spins down to x11embed then.
I cannot reproduce at all even with wmsystemtray running (with dropbox icon). I'll wait if more reports will come in
*** Bug 339941 has been marked as a duplicate of this bug. ***
This keeps happening here - and I don't use wmsystemtray anymore, btw.
Unfortunately you are still the only one with this issue (reported, anyway) and I honestly have no clue what's going south. Maybe it's libdbusmenu-qt? I believe this is stupid question but is it "recent enough"?
i also still have the issue on regular basis (the dup 339941) (regular means, at least on 70% after quitting plasmashell) libdbusmenu-qt(5) is at 0.9.3+14.10.20140619 this iirc only started to happen after David's 'Qt 5.4 fix'
Can you guys try to revert that commit and see if it really is that one? Actually there are two: b0e56119ab78e839fdaa7bf47370510dd0f3c8b1 fdc1ee538d249845061105412f28017ac77f618d Try just one first and see if it fixes it.
No luck, with either one or both reverted I still see KMix crash or quit when restarting plasmashell.
*** Bug 339307 has been marked as a duplicate of this bug. ***
Alright, this seems related to Qt5.4. Now I can reproduce too, so investigating.
Git commit 072679bd7044021b08a3ef04909719b5b3479f58 by Martin Klapetek. Committed on 14/01/2015 at 15:13. Pushed by mklapetek into branch 'master'. Properly check for systray being available The "org.kde.StatusNotifierWatcher" is just a watcher/helper, not the actual systray object, that's "org.kde.StatusNotifierHost-$PID". Because Plasma appends the PID (as per the specification), we cannot check directly for it being present on the bus, so we check the org.kde.StatusNotifierWatcher.IsStatusNotifierHostRegistered property that's meant to be used for this. Plus QSystemTrayIcon::isSystemTrayAvailable() is actually returning always true, because the Watcher is in kded and is /always/ present. This also fixes many apps with KSNI crashing on plasma exit, bug 339707 (though I believe this is not the direct cause for that bug) REVIEW: 121885 CHANGELOG M +7 -5 src/platformtheme/kdeplatformsystemtrayicon.cpp http://commits.kde.org/frameworkintegration/072679bd7044021b08a3ef04909719b5b3479f58