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/script/internal/RowScriptExecutor.java
{
	public static void handleOnPrepare( RowHandle rowHandle,
			ExecutionContext context )
	{
		try
		{
			IRow row = new Row( rowHandle );
			if ( handleJS( row, rowHandle.getOnPrepare( ), context ).didRun( ) )
				return;
			IRowEventHandler eh = getEventHandler( rowHandle, context );
			if ( eh != null )
				eh.onPrepare( row, context.getReportContext( ) );
		} catch ( Exception e )
		{
			addException( context, e );
		}
	}