[SOLVED] moc_kviz.cpp:72: error: undefined reference to `Kviz::on_lineEdit

moc_kviz.cpp:72: error: undefined reference to `Kviz::on_lineEdit_textChanged(QString const&)'

This error shows me the following:

void Kviz::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
{
    if (_c == QMetaObject::InvokeMetaMethod) {
        Kviz *_t = static_cast<Kviz *>(_o);
        Q_UNUSED(_t)
        switch (_id) {
        case 0: _t->on_lineEdit_textChanged((*reinterpret_cast< const QString(*)>(_a[1]))); break;
        default: ;
        }
    }
}

If I delete the switch, case and the default it will run a few times before coming back again. I assume this error is from when I had a lineEdit and I fiddled with its textChanged slot. But, I deleted that from the UI and the relevant code and I'm not sure why its coming back.

Solution

The qt_static_metacall is automatically generated by the MOC, that should be the reason why it shows after some time. I believe you forgot to delete on_lineEdit_textChanged(QString const&) from either *.c or *.h file.