D9189: Do not crash when completion object gets destroyed underneath us

[Anthony Fieroni]

anthonyfieroni added a reviewer: dfaure.
anthonyfieroni added inline comments.

INLINE COMMENTS

> kcombobox.cpp:317
>  
>      QComboBox::setLineEdit(edit);
>      d->klineEdit = qobject_cast<KLineEdit *>(edit);

KHistoryComboBox is constructed with line edit in, then setLineEdit removes it with completion object in.

REPOSITORY
  R284 KCompletion

REVISION DETAIL
  https://phabricator.kde.org/D9189

To: mwolff, dfaure
Cc: anthonyfieroni, dfaure, #frameworks
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