$res = $dbr->select( 'archive', '*', [ 'ar_rev_id' => $orig->getId() ] );
$this->assertTrue( is_object( $res ), 'query failed' );
$res = $dbr->select( 'archive', '*', [ 'ar_rev_id' => $orig->getId() ] );
$this->assertTrue( is_object( $res ), 'query failed' );