QTabBar incorrectly shows scroll buttons when eliding is enabled

QSize QTabBarPrivate::minimumTabSizeHint(int index)
{
    Q_Q(QTabBar);
    // ### Qt 5: make this a protected virtual function in QTabBar
    Tab &tab = tabList[index];

    const QFontMetrics fm = q->fontMetrics();

    QString oldText = tab.text;
    QString elidedText = computeElidedText(elideMode, oldText);

    if(fm.size(Qt::TextShowMnemonic, elidedText).width() < fm.size(Qt::TextShowMnemonic, oldText).width())
    {
       tab.text = elidedText;
       QSize elidedSize = q->tabSizeHint(index);
       tab.text = oldText;
       return elidedSize;
    }

    return q->tabSizeHint(index);
}