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
part.setCloseable(descriptor.isCloseable());
		part.setContributionURI(descriptor.getContributionURI());
		part.setLabel(descriptor.getLabel());
		part.setIconURI(descriptor.getIconURI());
		part.setTooltip(descriptor.getTooltip());
		part.getHandlers().addAll(EcoreUtil.copyAll(descriptor.getHandlers()));
		part.getTags().addAll(descriptor.getTags());
		part.getBindingContexts().addAll(descriptor.getBindingContexts());
		return part;
	}
	public MPart createPart(String id) {
		MPartDescriptor descriptor = findDescriptor(id);
		return createPart(descriptor);
	}
	public MPlaceholder createSharedPart(String id) {
		return createSharedPart(id, false);
	}
	public MPlaceholder createSharedPart(String id, boolean force) {
		MWindow sharedWindow = getWindow();
		
		MPart sharedPart = null;
		
		if (!force) {
			for (MUIElement element : sharedWindow.getSharedElements()) {
				if (element.getElementId().equals(id)) {
					sharedPart = (MPart) element;
					break;
				}
			}
		}