Bug 88352 Operation supports leaks contexts via action handler
I20050315-1100 Susan, this is a different leak from the one that I reported. Test Case: 1. open text editor 2. close text editor ==> DefaultUndoManager is leaked due to undo/redo actions handlers still holding on to the context.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/ObjectUndoContext.java
private IContextOperationApprover approver = null;
	private Object object;
	private String label;
	private List children = new ArrayList();
	/**
	 * Construct an operation context that represents the given object.
	 * 
	 * @param object -
	 *            the object to be represented.
	 */
	public ObjectUndoContext(Object object) {
		this(object, null);
	}