Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
SlotHandle columnSlot = handle.getColumns( );
		for ( int i = 0; i < columnSlot.getCount( ); i++ )
		{
			ColumnHandle columnHandle = (ColumnHandle) columnSlot.get( i );
			apply( columnHandle );
			if ( currentElement != null )
			{
				ColumnDesign columnDesign = (ColumnDesign) currentElement;
				for ( int j = 0; j < columnHandle.getRepeatCount( ); j++ )
				{
					table.addColumn( columnDesign );
				}
			}
		}
		
		SlotHandle headerSlot = handle.getHeader( );
		TableBandDesign header = createTableBand( headerSlot );
		table.setHeader( header );
		
		SlotHandle groupSlot = handle.getGroups( );
		for ( int i = 0; i < groupSlot.getCount( ); i++ )
		{
			apply( groupSlot.get( i ) );
			if ( currentElement != null )
			{
				table.addGroup( (TableGroupDesign) currentElement );
			}
		}