QTableView incorrect alternating row color for spanned rows when hiding row above

#include <QtGui>
#include <QtCore>

class MyWidget : public QWidget
{
Q_OBJECT
public:
	MyWidget(QWidget *parent=0) : QWidget(parent) {
		model = new QStandardItemModel(10, 5, this);
		for (int row = 0; row < 10; row++) {
			for (int col = 0; col < 5; col++) {
				QStandardItem *item = new QStandardItem(QString("row %0, col %1").arg(row).arg(col));
				model->setItem(row, col, item);
			}
		}
		view = new QTableView(this);
		view->setAlternatingRowColors(true);
		view->setModel(model);
		view->setSpan(7, 0, 1, 5);
	
		button = new QPushButton("Hide 3rd row", this);
		connect(button, SIGNAL(clicked()), this, SLOT(hideRow()));
	
		layout = new QVBoxLayout(this);
		layout->addWidget(view);
		layout->addWidget(button);
	}

public slots:
	void hideRow() { view->setRowHidden(2, true); }

private:
	QTableView *view;
	QStandardItemModel *model;
	QPushButton *button;
	QVBoxLayout *layout;
};

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    MyWidget w;
    w.resize(600,400);
    w.show();
    return a.exec();
}