moc should warn if I try to do something stupid like this:

class MyClass : public QObject
{
    Q_OBJECT
    Q_PROPERTY(bool prop READ prop)
    bool m_prop;
public:
    Q_INVOKABLE bool prop() { return m_prop; }
}

And likewise if the bool prop() method were a slot since in both cases the method name will clash with the property name when used from a QML/Javascript context.