CONF_R_RECURSIVE_SECTION_REFERENCE
{ ERR_PACK(ERR_LIB_CONF, 0, CONF_R_RECURSIVE_SECTION_REFERENCE),
ERR_raise(ERR_LIB_CONF, CONF_R_RECURSIVE_SECTION_REFERENCE);
if (ERR_GET_REASON(err) == CONF_R_RECURSIVE_SECTION_REFERENCE)