Освобождение вектора с указателями

m_treeStates.clear();

/*
    Qt 5.7 MSVC 64
    Tests QVector
*/
 
#include <QCoreApplication>
#include <QVector>
#include <QDebug>
 
struct Node{
    int a;
    int b;
    Node():a(10), b(100){}
};
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    const size_t SIZE = 5;
 
    QVector<Node*> v1;
    qDebug() << "\n QVector<Node*> v1 : " << v1;
 
    for(auto i(0); i < SIZE; i++)
        v1.append(new Node());
    qDebug() << "\n v1.append(new Node()); : " << v1;
 
    QVector<Node*> v2(v1);
    qDebug() << "\n QVector<Node*> v2(v1); : " << v2;
 
    Node * cur = v1.first();
    qDebug() << "\n Node * cur = v1.first(); : " << cur << ", cur->a : " << cur->a;
 
    v1.clear();
    qDebug() << "\n v1.clear() :" << v1 << ", v1.size() : " << v1.size() << ", v1.capacity() : " << v1.capacity();
    qDebug() << " Node * cur after "v1.clear();" : " << cur << ", cur->a : " << cur->a;
    qDebug() << " v2 after "v1.clear();" : " << v2;
 
    v1.squeeze();
    qDebug() << "\n v1.squeeze(); :" << v1 << ", v1.size() : " << v1.size() << ", v1.capacity() : " << v1.capacity();
 
    v2.squeeze();
    qDebug() << "\n v2.squeeze(); :" << v2 << ", v2.size() : " << v2.size() << ", v2.capacity() : " << v2.capacity();
    qDebug() << " Node * cur after "v2.squeeze();" : " << cur << ", cur->a : " << cur->a;
 
    delete cur;
    qDebug() << "\n delete cur; : " << cur << ", cur->a : " << cur->a;;
    qDebug() << " v2.first() after "delete cur;" : " << v2.first() << ", v2.first()->a : " << v2.first()->a;
 
 
    return a.exec();
}