#include <QGraphicsScene>
#include <QGraphicsRectItem>

class MyItem : public QGraphicsRectItem
{
public:
	using QGraphicsRectItem::QGraphicsRectItem;

protected:
	QVariant itemChange( GraphicsItemChange change, const QVariant& value )
	{
		// we want this item to be selected, no matter how setSelected() was called
		if ( change == ItemSelectedChange )
		{
			return true;
		}

		return QGraphicsRectItem::itemChange( change, value );
	}
};

void testQtBug_85474()
{
	QGraphicsScene scene;
	MyItem* pMyItem = new MyItem;
	pMyItem->setFlag( QGraphicsItem::ItemIsSelectable );
	pMyItem->setRect( 0, 0, 50, 50 );
	scene.addItem( pMyItem );

	pMyItem->setSelected( true );
	Q_ASSERT( !scene.selectedItems().isEmpty() );

	scene.clearSelection();
	Q_ASSERT( pMyItem->isSelected() );				// MyItem cannot be deselected
	Q_ASSERT( !scene.selectedItems().isEmpty() );	// inconsistent internal state

	delete pMyItem;
}