"Object::connect: No such slot QTextControl::copy() in text/qtextcontrol.cpp:2043" message

#ifndef QT_NO_CONTEXTMENU
QMenu *QTextControl::createStandardContextMenu(const QPointF &pos, QWidget *parent)
{
    Q_D(QTextControl);

    const bool showTextSelectionActions = d->interactionFlags & (Qt::TextEditable | Qt::TextSelectableByKeyboard | Qt::TextSelectableByMouse);

    d->linkToCopy = QString();
    if (!pos.isNull())
        d->linkToCopy = anchorAt(pos);

    if (d->linkToCopy.isEmpty() && !showTextSelectionActions)
        return 0;

    QMenu *menu = new QMenu(parent);
    QAction *a;

    if (d->interactionFlags & Qt::TextEditable) {
        a = menu->addAction(tr("&Undo") + ACCEL_KEY(QKeySequence::Undo), this, SLOT(undo()));
        a->setEnabled(d->doc->isUndoAvailable());
        a = menu->addAction(tr("&Redo") + ACCEL_KEY(QKeySequence::Redo), this, SLOT(redo()));
        a->setEnabled(d->doc->isRedoAvailable());
        menu->addSeparator();

        a = menu->addAction(tr("Cu&t") + ACCEL_KEY(QKeySequence::Cut), this, SLOT(cut()));
        a->setEnabled(d->cursor.hasSelection());
    }

    if (showTextSelectionActions) {
2043>        a = menu->addAction(tr("&Copy") + ACCEL_KEY(QKeySequence::Copy), this, SLOT(copy()));
        a->setEnabled(d->cursor.hasSelection());
    }

public Q_SLOTS:
    void setPlainText(const QString &text);
    void setHtml(const QString &text);

#ifndef QT_NO_CLIPBOARD
    void cut();
    void copy();
    void paste(QClipboard::Mode mode = QClipboard::Clipboard);
#endif