On Linux when sorting is enabled, the QHeaderViews cell size is calculated incorrectly

void
createTreeWidget(bool showBug)
{
  QTreeWidget *tw = new QTreeWidget();

  QTreeWidgetItem *hdr = new QTreeWidgetItem();
  hdr->setText(0,QLatin1String("Column-1"));
  hdr->setText(1,QLatin1String("Column-2"));

  tw->setHeaderItem(hdr);
  tw->setRootIsDecorated(false);

  if (!showBug)
  {
      tw->setSortingEnabled(true);
  }

  tw->header()->resizeSections(QHeaderView::ResizeToContents);

  if (showBug)
  {
      tw->setSortingEnabled(true);
  }

  tw->show();
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    createTreeWidget(true);
    createTreeWidget(false);

    return app.exec();
}