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
*/
	public void put(String key, ImageDescriptor descriptor) {
		Entry entry = getEntry(key);
		if (entry == null) {
			entry = new Entry();
			putEntry(key, entry);
		}
		if (entry.image == null) {
			entry.descriptor = descriptor;
			return;
		}
		throw new IllegalArgumentException("ImageRegistry key already in use: " + key); 
	}
	/**
	 * Adds an image to this registry.  This method fails if there
	 * is already an image or descriptor for the given key.
	 * <p>
	 * Note that an image registry owns all of the image objects registered
	 * with it, and automatically disposes of them when the SWT Display is disposed. 
	 * Because of this, clients must not register an image object
	 * that is managed by another object.
	 * </p>
	 *
	 * @param key the key
	 * @param image the image
	 * @exception IllegalArgumentException if the key already exists
	 */
	public void put(String key, Image image) {
		Entry entry = getEntry(key);
		if (entry == null) {