Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/swing/SwingRendererImpl.java
{
					throw new ChartException( ChartDeviceExtensionPlugin.ID,
							ChartException.RENDERING,
							ilex );
				}
				catch ( MalformedURLException muex )
				{
					throw new ChartException( ChartDeviceExtensionPlugin.ID,
							ChartException.RENDERING,
							muex );
				}
			}
			final Shape shClip = _g2d.getClip( );
			Area ar2 = new Area( r2d );
			if ( shClip != null )
			{
				Area ar1 = new Area( shClip );
				ar2.intersect( ar1 );
			}
			_g2d.setClip( ar2 );
			final Size szImage = _ids.getSize( img );
			int iXRepeat = (int) ( Math.ceil( r2d.width / szImage.getWidth( ) ) );
			int iYRepeat = (int) ( Math.ceil( r2d.height / szImage.getHeight( ) ) );
			ImageObserver io = (ImageObserver) _ids.getObserver( );
			for ( int i = 0; i < iXRepeat; i++ )
			{
				for ( int j = 0; j < iYRepeat; j++ )
				{
					_g2d.drawImage( img,
							(int) ( r2d.x + i * szImage.getWidth( ) ),