Possible QDnsLookup::lookup() memory leak

#include "dnsresolver.h"

DnsResolver::DnsResolver(QObject *parent) : QObject(parent)
{
    lookup = new QDnsLookup(QDnsLookup::A, "qt.io",QHostAddress("8.8.8.8"));
    connect(lookup, SIGNAL(finished()), this, SLOT(handleLookup()));
    lookup->lookup();
}

void DnsResolver::handleLookup()
{
    // I use sleep for letting the profiler inspect the memory trace with enough time
    QThread::sleep(10);

    // I won't use lookup anymore
    delete lookup;

    // Let's close the app
    QCoreApplication::quit();
}