Highcharts nodeName of undefined

Question

When playing around with a chart generated by highcharts, and exporting it to SVG, I get a lot of errors, about 1000 (nodeName of undefined) per 6 seconds

The code responsible is this:

element = wrapper.element,
nodeName = element.nodeName, // <---- Here (Cannot read property 'nodeName' of undefined)
renderer = wrapper.renderer,
skipAttr,
attrSetters = wrapper.attrSetters,
shadows = wrapper.shadows,
hasSetSymbolSize,
ret = wrapper;

The stacktrace (in Chrome 17.0.963)

Uncaught TypeError: Cannot read property 'nodeName' of undefined
SVGElement.attr highcharts.src.js:2008
init.Effect.HighchartsTransition.Class.create.update prototype-adapter.src.js:86
(anonymous function) effects.js:1
Effect.Base.Class.create.loop effects.js:1
Effect.ScopedQueue.Class.create.loop effects.js:1
b prototype.js:1

The fiddle to re-create : here, to reproduce click the series on/off and then click on the My Download link, switch on/off again and click on the My Download link again.

My question is as follows, is this my code, or a bug in highcharts; and how can I fix it?

Answer 1

Got the answer I was looking for; It was a bug in highcharts, fixed here

Answer 2

I am not really familiar with Prototype framework, but I did some tests and look at this code:

function getGraphSVG(options) {
    var svg;
    if (window.charts) {
        window.charts.each(function(pair) {
            svg = pair.value.getSVG(options);
            throw $break;
        });
    }

    return svg;
}

Somehow this each method returns 2 objects, one being undefined. So do the simple check:

if (pair.value)
     svg = pair.value.getSVG(options);

or in one line

pair.value && ( svg = pair.value.getSVG(options) );

and it should work.