D6376: Fix double delete crash during shutdown

[Christoph Cullmann]

cullmann added a comment.


  Next try ;=)
  Question is, can really such a race happen, that finishNotification triggers duplicate insertion?
  At least with a hash set, this won't lead to later issues.

REPOSITORY
  R289 KNotifications

REVISION DETAIL
  https://phabricator.kde.org/D6376

To: cullmann, #frameworks
Cc: rjvbb
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