tst_qitemselectionmodel.cpp: In function ‘Qt6::QDataStream& Qt6::operator>>(QDataStream&, QModelIndex&)’:
tst_qitemselectionmodel.cpp:138:35: warning: storing the address of local variable ‘helper’ in ‘*output.Qt6::QModelIndex::m’ [-Wdangling-pointer=]
  138 |     output = QStreamHelper::create(r, c, reinterpret_cast<void *>(ptr));
      |              ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tst_qitemselectionmodel.cpp:105:23: note: ‘helper’ declared here
  105 |         QStreamHelper helper;
      |                       ^~~~~~
tst_qitemselectionmodel.cpp:105:23: note: ‘output’ declared here

    static QModelIndex create(int row = -1, int column = -1, void *data = 0)
    {
        QStreamHelper helper;
        return helper.QAbstractItemModel::createIndex(row, column, data);
    }