Style sheet: When style sheet get applied on a Dialog button box with hidden buttons, buttons are displayed.

#include <QtGui>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QDialog dialog;
    
    QHBoxLayout *buttons = new QHBoxLayout(&dialog);
    QDialogButtonBox * buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
    buttons->addWidget(buttonBox);
    buttonBox->button(QDialogButtonBox::Ok)->setVisible(false);
    a.setStyleSheet("/* */");
    qDebug() << buttonBox->button(QDialogButtonBox::Ok)->isVisible();
    dialog.show();
    qDebug() << buttonBox->button(QDialogButtonBox::Ok)->isVisible();
    return dialog.exec();
}