D12371: fix always reproducible crash

[Jaime Torres Amate]

jtamate added a comment.


  In D12371#250366 <https://phabricator.kde.org/D12371#250366>, @apol wrote:
  
  > ^^' this won't work though. If the object gets deleted you will get a null pointer in the list.
  
  
  If the QPointer kdl detects that the guarded pointer is invalid it is removed from the list.
  
    if (kdl.isNull()) {
        curHolders.removeAll(kdl);
    }
  
  I'm unable to create the crash.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D12371

To: jtamate, dfaure, #frameworks, apol
Cc: apol, michaelh, bruns
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