Bug 329482 Uninstantiated part may be rendered when closing another part in the same stack
1. Activate the 'Javadoc' view. 2. Activate the 'Package Explorer' view. 3. Shutdown. 4. Restart. 5. Ctrl+3 > Properties 6. Hide the 'Properties' view. 7. Now the 'Problems' view is the selected element. It should be the 'Javadoc' view.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
if (constructed && !listeners.isEmpty()) {
				if (lastActivePart != null && lastActivePart != activePart) {
					firePartDeactivated(lastActivePart);
				}
				if (activePart != null) {
					firePartActivated(activePart);
				}
			}
		}
	}
	@PostConstruct
	void postConstruct() {
		eventBroker.subscribe(UIEvents.buildTopic(UIEvents.ElementContainer.TOPIC,
				UIEvents.ElementContainer.SELECTEDELEMENT), selectedHandler);
		constructed = true;
		partActivationHistory = new PartActivationHistory(this, modelService);
		if (activePart != null) {
			partActivationHistory.queue(activePart);
		}
	}
	@PreDestroy
	void preDestroy() {
		constructed = false;
		eventBroker.unsubscribe(selectedHandler);
		partActivationHistory.clear();
	}
	private void firePartActivated(MPart part) {
		for (Object listener : listeners.getListeners()) {
			((IPartListener) listener).partActivated(part);