Application crashes when clearing the QTreeWidget

My application is crashing with a BAD_ACCESS when quitting and when clearing the QTreeWidget.

This is how I'm populating the first level of the tree:

std::set<UrlItem>::iterator i;

for(i = crawler->getUrls()->begin() ; i != crawler->getUrls()->end() ; i++) {
    QList<QString> cells;
    cells.append(i->url);
    cells.ap开发者_运维百科pend(i->httpStatusMessage);
    cells.append(QString("%1").arg(i->statusCode));

    QTreeWidgetItem *item = new QTreeWidgetItem(ui->resultTreeView, QStringList(cells));

    ui->resultTreeView->addTopLevelItem(item);
}

I believe that the header item is causing the crash:

ui->resultTreeView->setHeaderItem(new QTreeWidgetItem(ui->resultTreeView, QStringList(headers)));

What am I doing to cause this crash? The item that is dynamically allocated has the tree widget as it's parent so it should only be destroyed when the tree widget is.

---

It seems I was setting the header the wrong way.

This works fine:

QList<QString> headers;
headers.append(tr("Url"));
headers.append(tr("Message"));
headers.append(tr("Status code"));

ui->resultTreeView->setHeaderLabels(QStringList(headers));

Now, what setHeaderItem was supposed to do and why it crashed my application I don't know but the code above achieved the desired effect.