Bug 108102 [Viewers] Project expands in wrong working set
I am using "Show->Working Sets" in the package explorer. Some of the working sets contain the same project: Working Set-1: - Project-A - Project-B - Project-C Working Set-2: - Project-B - Project-C - Project-D If I now double-click "Working Set-1.Project-B" "Project-B" in working set "Working Set-2" will be expanded. If the working set "Working Set-2" itself is not expanded it will seem as if nothing happens, but after expanding "Working Set-2" one can see the changed state of the project. Double-clicking "Working Set-2.Project-B" works as expected.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
if (elementChildren == null) {
        	if (isTreePathContentProvider() && widget instanceof Item) {
				TreePath path = getTreePathFromItem((Item)widget);
				elementChildren = getSortedChildren(path);
			} else {
				elementChildren = getSortedChildren(parent);
			}
        }
        Control tree = getControl();
        
        int oldCnt = -1;
        if (widget == tree) {
			oldCnt = getItemCount(tree);
		}
        Item[] items = getChildren(widget);
        
        CustomHashtable expanded = newHashtable(CustomHashtable.DEFAULT_CAPACITY); 
        for (int i = 0; i < items.length; ++i) {
            if (getExpanded(items[i])) {
                Object element = items[i].getData();
                if (element != null) {
                    expanded.put(element, element);
                }
            }
        }
        int min = Math.min(elementChildren.length, items.length);