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
engine.createGui(part);
				MElementContainer<MUIElement> parent = part.getParent();
				if (parent.getChildren().size() == 1) {
					parent.setSelectedElement(part);
				}
			}
			return part;
		}
		return part;
	}
	public MPart showPart(String id, PartState partState) {
		Assert.isNotNull(id);
		Assert.isNotNull(partState);
		MPart part = findPart(id);
		if (part != null) {
			return showPart(part, partState);
		}
		MPartDescriptor descriptor = findDescriptor(id);
		part = createPart(descriptor);
		if (part == null) {
			return null;
		}
		return showPart(partState, part, part);
	}
	public MPart showPart(MPart part, PartState partState) {
		Assert.isNotNull(part);
		Assert.isNotNull(partState);
		MPart localPart = findPart(part.getElementId());
		if (localPart != null) {
			return showPart(partState, part, localPart);