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
labelItem.setHelpText( handle.getHelpTextKey( ), handle.getHelpText( ) );
		
		currentElement = labelItem;
	}
	public void visitDataItem( DataItemHandle handle )
	{
		
		DataItemDesign data = new DataItemDesign( );
		setupReportItem( data, handle );
		data.setName( handle.getName( ) );
		 
		
		String expr = handle.getResultSetColumn( );
		if (expr != null && expr.trim( ).length( ) > 0)
		{
			expr = "row[\"" + expr.replaceAll( "\"", "\\\"") + "\"]";
			data.setValue( expr );
		}
		
		ActionHandle action = handle.getActionHandle( );
		if ( action != null )
		{
			data.setAction( createAction( action ) );
		}
		
		data.setHelpText( handle.getHelpTextKey( ), handle.getHelpText( ) );
		setHighlight( data, expr );
		setMap( data, expr );
		currentElement = data;