Bug 48452 Widget is disposed while closing cool bar
This is the problem that is occurring in the nightly builds. There is something happening where a cool bar is attempting to layout disposed cool bar items.
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ToolBarContributionItem.java
super(id);
		Assert.isTrue(toolBarManager instanceof ToolBarManager);
		this.toolBarManager = (ToolBarManager)toolBarManager;
	}
	
	/**
	 * Convenience method equivalent to 
	 * <code>ToolBarContributionItem(toolBarManager, null)</code>.
	 * 
	 * @param toolBarManager the tool bar manager
	 */
	public ToolBarContributionItem(IToolBarManager toolBarManager) {
		this(toolBarManager,null);
	}
	
	/**
	 * Convenience method equivalent to
	 * <code>ToolBarContributionItem(new ToolBarManager(), null)</code>.
	 */
	public ToolBarContributionItem() {
		this(new ToolBarManager(), null);
	}
	
	/**
	 * Returns the internal tool bar manager of the contribution item.
	 * 
	 * @return the tool bar manager, or <code>null</code> if one is not defined.
	 * @see IToolBarManager
	 */
	public IToolBarManager getToolBarManager() {