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
entry = new Entry();
			putEntry(key, entry);
		}
		if (entry.image == null && entry.descriptor == null) {
			entry.image = image;
			return;
		}
		throw new IllegalArgumentException("ImageRegistry key already in use: " + key); 
	}
	/**
	 * Removes an image from this registry.  
     * If an SWT image was allocated, it is disposed.
	 * This method has no effect if there is no image or descriptor for the given key.
	 * @param key the key
	 */
	public void remove(String key) {
		if (table == null)
			return;
		Entry entry = (Entry) getTable().remove(key);
		if (entry != null) {
		    if (entry.image != null && !entry.image.isDisposed()) {
		        entry.image.dispose();
		    }
		    entry.image = null;
		}
	}
	/**
	 * Contains the data for an entry in the registry. 
	 */
	private static class Entry {