QDBusArgument string and array extraction operators crash with incorrectly typed DBus arguments

QDbusArgument public extraction operators
QDBusArgument::operator>>(QString &arg)
QDBusArgument::operator>>(QDBusObjectPath &arg)
QDBusArgument::operator>>(QDBusSignature &arg)
QDBusArgument::operator>>(QStringList &arg) const;
QDBusArgument::operator>>(QByteArray &arg) const

Do not perform DBus type checking. The string extraction operators use an invalid pointer if used to extract a non-string value from a DBus message. The QStringList and QByteArray extraction operators crash with non-array or incorrect array element types. The functions should perform basic DBus type checking and deny extraction of incompatible values.