Changing copy of QSqlQuery changes original.

QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "test");
db.setDatabaseName(":memory:");
db.open();
QSqlQuery createQuery(db);
createQuery.exec("CREATE TABLE if not exists test"
                                     "(test_id integer)");

QSqlQuery query1(db);
query1.prepare("INSERT INTO test (test_id) VALUES(:test_id)");
query1.bindValue(":test_id", 1); //this returns 1
qDebug() << query1.boundValue(":test_id");
QSqlQuery query2(query1); //QSqlQuery query2 = query1;
query2.bindValue(":test_id", 2);
qDebug() << query1.boundValue(":test_id") << query2.boundValue(":test_id"); //both return 2