•The resolve_stack_dump  utility is removed. Stack traces from official MySQL builds are always symbolized, so there is no need to use resolve_stack_dump . 

•The following server error codes are not used and have been removed. Applications that test specifically for any of these errors should be updated. 

ER_BINLOG_READ_EVENT_CHECKSUM_FAILURE ER_BINLOG_ROW_RBR_TO_SBR ER_BINLOG_ROW_WRONG_TABLE_DEF ER_CANT_ACTIVATE_LOG ER_CANT_CHANGE_GTID_NEXT_IN_TRANSACTION ER_CANT_CREATE_FEDERATED_TABLE ER_CANT_CREATE_SROUTINE ER_CANT_DELETE_FILE ER_CANT_GET_WD ER_CANT_SET_GTID_PURGED_WHEN_GTID_MODE_IS_OFF ER_CANT_SET_WD ER_CANT_WRITE_LOCK_LOG_TABLE ER_CREATE_DB_WITH_READ_LOCK ER_CYCLIC_REFERENCE ER_DB_DROP_DELETE ER_DELAYED_NOT_SUPPORTED ER_DIFF_GROUPS_PROC ER_DISK_FULL ER_DROP_DB_WITH_READ_LOCK ER_DROP_USER ER_DUMP_NOT_IMPLEMENTED ER_ERROR_DURING_CHECKPOINT ER_ERROR_ON_CLOSE ER_EVENTS_DB_ERROR ER_EVENT_CANNOT_DELETE ER_EVENT_CANT_ALTER ER_EVENT_COMPILE_ERROR ER_EVENT_DATA_TOO_LONG ER_EVENT_DROP_FAILED ER_EVENT_MODIFY_QUEUE_ERROR ER_EVENT_NEITHER_M_EXPR_NOR_M_AT ER_EVENT_OPEN_TABLE_FAILED ER_EVENT_STORE_FAILED ER_EXEC_STMT_WITH_OPEN_CURSOR ER_FAILED_ROUTINE_BREAK_BINLOG ER_FLUSH_MASTER_BINLOG_CLOSED ER_FORM_NOT_FOUND ER_FOUND_GTID_EVENT_WHEN_GTID_MODE_IS_OFF__UNUSED ER_FRM_UNKNOWN_TYPE ER_GOT_SIGNAL ER_GRANT_PLUGIN_USER_EXISTS ER_GTID_MODE_REQUIRES_BINLOG ER_GTID_NEXT_IS_NOT_IN_GTID_NEXT_LIST ER_HASHCHK ER_INDEX_REBUILD ER_INNODB_NO_FT_USES_PARSER ER_LIST_OF_FIELDS_ONLY_IN_HASH_ERROR ER_LOAD_DATA_INVALID_COLUMN_UNUSED ER_LOGGING_PROHIBIT_CHANGING_OF ER_MALFORMED_DEFINER ER_MASTER_KEY_ROTATION_ERROR_BY_SE ER_NDB_CANT_SWITCH_BINLOG_FORMAT ER_NEVER_USED ER_NISAMCHK ER_NO_CONST_EXPR_IN_RANGE_OR_LIST_ERROR ER_NO_FILE_MAPPING ER_NO_GROUP_FOR_PROC ER_NO_RAID_COMPILED ER_NO_SUCH_KEY_VALUE ER_NO_SUCH_PARTITION__UNUSED 

