Bug 15844 [Exception Handling] SelectionChange events and NPE
Build 20020508 Due to new global actions there are now more objects listening to selection changes send out by a JFace viewer. We now had the case that one of the listener generated a NPE. As a result all listeners registered after that one didn't receive the selection change event. StructuredViewers should be more fault tolorant to exceptions when informing listeners.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
for (int i = 0; i < min; ++i) {
		Item item = items[i];
		Object oldElement = item.getData();
		if (oldElement != null) {
			Object newElement = elementChildren[i];
			if (newElement != oldElement) {
				if (newElement.equals(oldElement)) {
					 
					
					item.setData(newElement);
					mapElement(newElement, item);
				} else {
					disassociate(item);
				}
			}
		}
	}
	for (int i = 0; i < min; ++i) {
		Item item = items[i];
		if (item.getData() == null) {
			Object newElement = elementChildren[i];
			associate(newElement, item);