Qt Creator does not show QStringList content

#include <QCoreApplication>
#include <QString>
#include <QVector>

struct CorePrivate
{
    QVector<QStringList> names;
};

int main(int argc, char *argv[])
{
    CorePrivate *p = new CorePrivate;
    p->names.push_back(QStringList());
    for (int i = 0; i < 10; ++i)
        p->names[0].push_back(QString("test: ") + QString(i));

    delete p;

    return 0;
}