Bug 121111 Bad event handler class name does not cause an error
Open a report design, open any Data Set's Property editor. Type in an invalid Java class name for the "Event Handler Class" property, say "aaa". Preview a report that uses that Data Set. The report executes normally. No error is shown. Event handlers are an integral part of a report design, and if a script handler class is not found, or if the handler throws a runtime exception, Report Engine should either stop the report execution, or show the error message in the generated report. (Tested with the 2005-12-15 nightly build)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/RenderTask.java
{
	ReportDocumentReader reportDoc;
	String emitterID;
	/**
	 * @param engine
	 *            the report engine
	 * @param runnable
	 *            the report runnable object
	 * @param reportDoc
	 *            the report document instance
	 */
	public RenderTask( ReportEngine engine, IReportRunnable runnable,
			ReportDocumentReader reportDoc )
	{
		super( engine, runnable );
		executionContext.setFactoryMode( false );
		executionContext.setPresentationMode( true );
		
		loadDesign( );
		
		openReportDocument( reportDoc );
	}
	protected void openReportDocument( ReportDocumentReader reportDoc )