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
}
	/**
	 * Creates an empty image registry.
	 */
	public ImageRegistry(Display display) {
		super();
		Assert.isNotNull(display);
		hookDisplayDispose(display);
	}
	/**
	 * Returns the image associated with the given key in this registry, 
	 * or <code>null</code> if none.
	 *
	 * @param key the key
	 * @return the image, or <code>null</code> if none
	 */
	public Image get(String key) {
		
		
		if (key == null){
			return null;
		}
		/**
		 * NOTE, for backwards compatibility the following images are supported
		 * here, they should never be disposed, hence we explicitly return them 
		 * rather then registering images that SWT will dispose.  
		 * 
		 * Applications should go direclty to SWT for these icons.
		 * 
		 * @see Display.getSystemIcon(int ID)