Bug 61743 NPE in MessageDialog with null parent shell
I-build 2004-05-11 I have code that does the following: MessageDialog.openInformation(null, "Showing element", "Showning an integer of value: "+((Integer)match.getElement()).intValue()); This leads to a null pointer with the follwing stack trace: Thread [main] (Suspended (exception NullPointerException)) MessageDialog.<init>(Shell, String, Image, String, int, String[], int) line: 126 MessageDialog.openInformation(Shell, String, String) line: 305 TestUIParticipant.showMatch(Match, int, int, boolean) line: 57 JavaSearchResultPage.showMatch(Match, int, int, boolean) line: 153 AbstractTextSearchViewPage$9.run() line: 723 <snip> The API doc for MessageDialog say that I'm allowed to pass in null for the parent shell.
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/ImageRegistry.java
* <p>
 * Clients may instantiate this class (it was not designed to be subclassed).
 * </p>
 * <p>
 * Unlike the FontRegistry, it is an error to replace images. As a result
 * there are no events that fire when values are changed in the registry
 * </p>
 */
public class ImageRegistry {
	/**
	 * Table of known images keyed by symbolic image name
	 * (key type: <code>String</code>, 
	 *  value type: <code>org.eclipse.swt.graphics.Image</code>
	 *  or <code>ImageDescriptor</code>).
	 */
	private Map table = null;
	
	/**
	 * display used when getting images
	 */
	private Display display;
	/**
	 * Creates an empty image registry.
	 * <p>
	 * There must be an SWT Display created in the current 
	 * thread before calling this method.
	 * </p>
	 */
	public ImageRegistry() {
		this(Display.getCurrent());