Review Request 123731: Cleanup handling of notifications closing

[Martin Klapetek]

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https://git.reviewboard.kde.org/r/123731/
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Review request for KDE Frameworks.


Repository: knotifications


Description
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While investigating the cause of crash of https://bugs.kde.org/show_bug.cgi?id=342752 I've come across some loose ends in how KNotifications is handling closing of notifications.

As for the crash itself, I never managed to reproduce even with special written test cases, but what happens (or seem to) is this:
 * KNotification object gets deleted
 * The destructor calls close() on all plugins
 * The NotifyByPopup plugin does async dbus call to close the notification and returns
 * KNotification's dpointer is deleted
 * The DBus reply returns, calling NotifyByPopup::finished()
 * Now for some reason the KNotification object is still not null but its dpointer is gone, so the check "if (!notification || d->notifications.contains(notification->id()))" crashes on the notification->id() call

So I've made it simply return -1 when dpointer is null, which should ideally prevent the crashes


Diffs
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  src/knotification.cpp 01962b3 
  src/knotificationmanager.cpp 0d9b3b0 
  src/knotificationmanager_p.h f8e7df8 
  src/notifybypopup.cpp 2f84ab0 

Diff: https://git.reviewboard.kde.org/r/123731/diff/


Testing
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Thanks,

Martin Klapetek

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