Bug 209309 Show javascript errorposition
If a javascript expression has errors, the error message is shown in the last lines in the preview tab. But there is no info where the error occurs. In most cases you had to guess the error location. It would be very helpfull to display the error location.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
private int MAX_ERRORS = 100;
	/**
	 * 
	 */
	private IDocArchiveReader dataSource;
	
	/**
	 * All page break listeners.
	 */
	private List pageBreakListeners;
	
	/**
	 * create a new context. Call close to finish using the execution context
	 */
	public ExecutionContext( )
	{
		this( null );
	}
	/**
	 * create a new context. Call close to finish using the execution context
	 */
	public ExecutionContext( EngineTask engineTask )
	{
		if ( engineTask != null )
		{
			task = engineTask;
			engine = task.getEngine( );
			log = task.getLogger( );
		}
		else