Query.pack() съедает addRelation

[Old]

Query.pack() "съедает" qbds.addRelation, в отличии от qbds.relations(true).

static void Job1(Args _args)
{
	Query				   query, q;
	QueryRun				queryRun;
	QueryBuildDataSource	qbds;
	DictRelation			dr;
   ;
	query   = new Query();
	qbds	= query.addDataSource(TableNum(InventTable));

	dr = new DictRelation(tableNum(InventTableModule));
	dr.loadTableRelation(TableNum(InventTable));

	qbds	= qbds.addDataSource(tableNum(InventTableModule));
	qbds.addRelation(dr);
	info(query.dataSourceNo(1).toString());
	q = new Query(query.pack());
	info(q.dataSourceNo(1).toString());
	qbds.relations(true);
	q = new Query(query.pack());
	info(q.dataSourceNo(1).toString());
}

Это Бага или Фича?