Can you try compiling in PRETTY? This will make the retaining tree graph in 
chrome's inspector easier to tell where things are coming from and what is 
tracking them. But at a glance, something registered something with 
google.visualization, and didn't unregister it. Knowing what gD, iv, and fv 
are in that tree might give you a better hint about what might be stuck - 
another callback, a different instance, etc.

On Tuesday, December 3, 2013 2:44:50 PM UTC-6, ak...@ualberta.net wrote:
>
> I posted this to Stackoverflow<http://stackoverflow.com/q/20129862/770519>and 
> to the gwt-vizualization team as a possible 
> bug <http://code.google.com/p/gwt-google-apis/issues/detail?id=529>, but 
> I have not received any replies from either post.  Perhaps someone here has 
> some insight into what is going on, or knows someone on the gwt-google-api 
> team, or is on the team.
>
> I have an MVP GWT 2.5.1 app using version 1.1.1 of gwt-visualization. My 
> view has two Buttons and a VerticalPanel (accessed by the presenter as 
> display.getPanel()). One button adds a PieChart to the VerticalPanel, the 
> the other removes it. The presenter holds the PieChart reference as a 
> Widget so that it knows when it has been added/removed. It is initialized 
> to null.
>
> I checked chrome's dev tools to ensure that the add/remove code wasn't 
> creating a DOM leak. But after the PieChart was removed, its elements 
> were left behind in a detached DOM tree, all color coded red. When I tried 
> the same add/remove code with a Label instead of a PieChart, no detached 
> DOM tree remained after removal.
>
> I have a project on github that will reproduce this:
>
> git clone https://github.com/akydd/GWT-experiments.git
>
> Clone, build it, and deploy it so it can be run in Production mode.  It 
> should have the following URL if deployed to the root folder of your local 
> webserver: http://127.0.0.1/WidgetAddDelete.html.  Open it up in Chrome.
>
> To see the issue, click the button on the first screen.  You should now 
> see multiple buttons on screen.  Click "Add chart", wait for the chart to 
> draw, then click "Remove chart".  Using Chrome's dev tools, take a heap 
> snapshot.  You should see about 36 elements in the detached DOM tree that 
> are left over from the removed PieChart:
>
>
> <https://lh5.googleusercontent.com/-Y1HQk_ZEjW4/Up5CgM_qnlI/AAAAAAAAAA4/EsZB2I9nExU/s1600/Screen+Shot+2013-12-03+at+1.38.30+PM.png>
>
> It looks to me that there is a DOM leak with the PieChart widget.  Can 
> someone confirm?  Or perhaps there is another way that I should be removing 
> the PieChart widget?  I'm using the HasWidgets interface methods add(Wudget 
> w) and remove(Widget w) to add and remove, respectively.
>

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