Bug 306218

Resource that is not configured in Kontact is not running thus it cannot crash :) 

Could you please check your $HOME/.xsession-errors if there are any information about the crash You can search for a line similar to "KCrash: Application 'akonadi_googlecalendar_resource_6' crashing...", which will be followed by information about unhandled exception which caused the crash. It would really help me to track down what exactly happened.

Sure.

====================================================================
grep -n -A 20 akonadi_googlecalendar_resource_6 ~/.xsession-errors
431:Known subscriber "akonadi_googlecalendar_resource_6" subscribes again 
432-Database "akonadi" opened using driver "QMYSQL" 
433-Known subscriber "AkonadiAgentServer" subscribes again 
434-void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.52", ":1.54", ":1.51", ":1.53", ":1.56") 
435-Known subscriber "AkonadiAgentServer" subscribes again 
436-void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.52", ":1.54", ":1.51", ":1.53", ":1.56", ":1.57") 
437-Known subscriber "AkonadiAgentServer" subscribes again 
438-void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.52", ":1.54", ":1.51", ":1.53", ":1.56", ":1.57", ":1.55") 
439-Agent instance created in separate process. 
440-Known subscriber "AkonadiAgentServer" subscribes again 
441-Known subscriber "AkonadiAgentServer" subscribes again 
442-void Akonadi::NotificationSource::addClientServiceName(const QString&) Notification source "AkonadiAgentServer" now serving: (":1.52", ":1.54", ":1.51", ":1.53", ":1.56", ":1.57", ":1.55", ":1.61") 
443-kwalletd(2604)/kdeui (Wallet) KWalletD::setupDialog: Application ' "Google Calendars and Tasks" ' using kwallet without parent window! 
444-Agent instance created in separate process. 
445-Known subscriber "AkonadiAgentServer" subscribes again 
446-Agent instance created in separate process. 
447-Known subscriber "AkonadiAgentServer" subscribes again 
448-Agent instance created in separate process. 
449-Known subscriber "AkonadiAgentServer" subscribes again 
450-Database "akonadi" opened using driver "QMYSQL" 
451-Database "akonadi" opened using driver "QMYSQL" 
--
5345:akonadi_googlecalendar_resource_6(2712) KGoogle::AccessManagerPrivate::nam_replyReceived: Requested resource is forbidden. 
5346:akonadi_googlecalendar_resource_6(2712) KGoogle::AccessManagerPrivate::nam_replyReceived: "{
5347- "error": {
5348-  "errors": [
5349-   {
5350-    "message": "Forbidden"
5351-   }
5352-  ],
5353-  "code": 403,
5354-  "message": "Forbidden"
5355- }
5356-}
5357-" 
5358-Qt has caught an exception thrown from an event handler. Throwing
5359-exceptions from an event handler is not supported in Qt. You must
5360-reimplement QApplication::notify() and catch all exceptions there.
5361-
5362-Qt has caught an exception thrown from an event handler. Throwing
5363-exceptions from an event handler is not supported in Qt. You must
5364-reimplement QApplication::notify() and catch all exceptions there.
5365-
5366-terminate called after throwing an instance of 'Akonadi::PayloadException'
--
5370:Lost connection to resource "org.freedesktop.Akonadi.Resource.akonadi_googlecalendar_resource_6" , discarding cached interface 
5371:void Akonadi::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_googlecalendar_resource_6" now serving: () 
5372:void Akonadi::NotificationSource::unsubscribe() "akonadi_googlecalendar_resource_6" 
5373-ProcessControl: Application '/usr/local/bin/akonadi_googlecalendar_resource' returned with exit code 253 (Unknown error)
5374:akonadi_googlecalendar_resource_6(14719)/libakonadi Akonadi::SessionPrivate::socketError: Socket error occurred: "QLocalSocket::connectToServer: Invalid name" 
5375:Known subscriber "akonadi_googlecalendar_resource_6" subscribes again 
5376-Object::connect: No such signal QTimeEdit::timeEdited(QTime)
5377-QLayout: Attempting to add QLayout "" to QGroupBox "", which already has a layout
5378-Known subscriber "kontact" subscribes again 
5379-plasma-desktop(2625)/plasma StatusNotifierItemSource::contextMenu: Could not find DBusMenu interface, falling back to calling ContextMenu() 
5380-plasma-desktop(2625)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application 
5381-AgentManager::removeAgentInstance: calling instance->quit() 
5382-PreprocessorManager::unregisterInstance( "akonadi_davgroupware_resource_0" ) 
5383-QProcess: Destroyed while process is still running.
5384-ProcessControl: Application '/usr/bin/akonadi_davgroupware_resource' stopped unexpectedly (Process crashed)
5385-Application '/usr/bin/akonadi_davgroupware_resource' crashed. No restart!
5386-Lost connection to resource "org.freedesktop.Akonadi.Resource.akonadi_davgroupware_resource_0" , discarding cached interface 
5387-void Akonadi::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_davgroupware_resource_0" now serving: () 
5388-void Akonadi::NotificationSource::unsubscribe() "akonadi_davgroupware_resource_0" 
5389-QString::arg: Argument missing: , rmsppu@gmail.com
5390-KGlobal::locale::Warning your global KLocale is being recreated with a valid main component instead of a fake component, this usually means you tried to call i18n related functions before your main component was created. You should not do that since it most likely will not work 
5391-KGlobal::locale::Warning your global KLocale is being recreated with a valid main component instead of a fake component, this usually means you tried to call i18n related functions before your main component was created. You should not do that since it most likely will not work 
5392-plasma-desktop(2625)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application 
5393-plasma-desktop(2625)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application 
5394-plasma-desktop(2625)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application 
5395-plasma-desktop(2625)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application 
--
6004:Lost connection to resource "org.freedesktop.Akonadi.Resource.akonadi_googlecalendar_resource_6" , discarding cached interface 
6005:void Akonadi::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_googlecalendar_resource_6" now serving: () 
6006:void Akonadi::NotificationSource::unsubscribe() "akonadi_googlecalendar_resource_6" 
6007-QProcess: Destroyed while process is still running.
6008-ProcessControl: Application '/usr/bin/akonadi_davgroupware_resource' stopped unexpectedly (Process crashed)
6009-Application '/usr/bin/akonadi_davgroupware_resource' crashed. No restart!
6010-void Akonadi::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_davgroupware_resource_1" now serving: () 
6011-void Akonadi::NotificationSource::unsubscribe() "akonadi_davgroupware_resource_1" 
6012-Lost connection to resource "org.freedesktop.Akonadi.Resource.akonadi_davgroupware_resource_1" , discarding cached interface 
6013-QProcess: Destroyed while process is still running.
6014-ProcessControl: Application '/usr/bin/akonadi_davgroupware_resource' stopped unexpectedly (Process crashed)
6015-Application '/usr/bin/akonadi_davgroupware_resource' crashed. No restart!
6016-Lost connection to resource "org.freedesktop.Akonadi.Resource.akonadi_davgroupware_resource_2" , discarding cached interface 
6017-void Akonadi::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_davgroupware_resource_2" now serving: () 
6018-void Akonadi::NotificationSource::unsubscribe() "akonadi_davgroupware_resource_2" 
6019-QProcess: Destroyed while process is still running.
6020-ProcessControl: Application '/usr/local/bin/akonadi_googlecalendar_resource' stopped unexpectedly (Process crashed)
6021-Application '/usr/local/bin/akonadi_googlecalendar_resource' crashed. No restart!
6022-Application '/usr/bin/akonadi_agent_launcher' exited normally...
6023-Application '/usr/bin/akonadi_agent_launcher' exited normally...
6024-Application '/usr/bin/akonadi_agent_launcher' exited normally...
6025-Application '/usr/bin/akonadi_maildispatcher_agent' exited normally...
6026-Application '/usr/bin/akonadi_mixedmaildir_resource' exited normally...
================================================================

My "solution" was to:
        akondictl stop
        rm -f ~/.config/akonadi/*
        rm -f ~/.kde/share/config/ak*
        akonadictl start

Thanks! That's very helpful.

*** This bug has been marked as a duplicate of bug 305584 ***