The const_iterator of containers(likes QList,QMap...etc) has a bug when it's empty

Just like:

// an empty QList
QList<int> lst;

for(QList<int>::const_iterator iter = lst.constBegin(); iter != lst.end(); ++iter)
{
	qDebug() << *iter;
}

The code above cannot work and will lead to a crash, only because I use 'lst.end()' instead of 'lst.constEnd()'. But the problem disappers when the QList is not empty.