passing cpp exported enum to cpp function as param (from python) prints error

EnumValueType getValue(PyObject *enumItem)
{
    init_enum();

    assert(Enum::check(enumItem));

    // PYSIDE-1735: Decide dynamically if new or old enums will be used.
    if (useOldEnum)
        return reinterpret_cast<SbkEnumObject *>(enumItem)->ob_value;

    std::cerr << __FUNCTION__ << ' ' << Shiboken::debugPyObject(enumItem)
              << " err=" << Shiboken::debugPyObject(PyErr_Occurred()) << '\n';

    AutoDecRef pyValue(PyObject_GetAttrString(enumItem, "value"));
    return PyLong_AsLongLong(pyValue);}