davidedmundson added a comment.

  Thanks for following this up!
  
  In keepassx you need a second QMimeData
  
    void QClipboard::setMimeData(QMimeData *src, Mode mode = Clipboard)
    Sets the clipboard data to src. Ownership of the data is transferred to the 
clipboard. 
  
  So the second call you're passing data you don't own. Not sure if that's the 
cause of your issue. Maybe dump your full code somewhere and I'll take a look?
  
  Interestingly your warning doesn't come from setting the data. That warning 
is in QXcbClipboard::handleSelectionRequest   i.e getting the current clipboard 
information back.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D12373

To: hoffmannrobert
Cc: graesslin, broulik, davidedmundson, plasma-devel, ragreen, Pitel, ZrenBot, 
lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart

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