EntityFieldQuery: field_sql_storage can't handle entityOrderBy (fatal error)

I've been writing some tests for #885014: Add pager and tablesort to EntityFieldQuery, and this example gave me a fatal error (undefined method EntityFieldQuery::orderBy in field_sql_storage.module):

$query = new EntityFieldQuery();
$query->fieldCondition($this->fields[0], 'value', 2, '>');
$query->entityOrderBy('entity_id', 'asc');
$query->execute();

What's the problem?
field_sql_storage_field_storage_query() has the following code:

  foreach ($query->entityOrder as $key => $direction) {
    $sql_field = $key == 'entity_type' ? 'fcet.type' : "$field_base_table.$key";
    $query->orderBy($sql_field, $direction);
  }
  return $query->finishQuery($select_query, $id_key);

$query is EntityFieldQuery here, we need $select_query instead.