Bug 100565 [Viewers] Tree viewer selection not revealed if unchanged
[RC3] Steps: 1. Check out org.eclipse.ui.workbench 2. Open Workbench.java 3. Ctrl-O to open Quick Outline 4. Type "r", note that the field "runEventLoop" is the first match 5. Type "u", note that the field is not shown anymore 6. Type arrow-down key, note that you cannot see the selected entry
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
private Object element;
        private Item item;
        UpdateItemSafeRunnable(Item item, Object element) {
            this.item = item;
            this.element = element;
        }
        public void run() {
            doUpdateItem(item, element);
        }
        
    }
    /**
     * Creates an abstract tree viewer. The viewer has no input, no content
     * provider, a default label provider, no sorter, no filters, and has
     * auto-expand turned off.
     */
    protected AbstractTreeViewer() {
        
    }
    /**
     * Adds the given child elements to this viewer as children of the given