Error after folding/unfolding compound nodes #6
Description
After clicking on a compound node multiple times to fold/unfold it in the interactive view, the graph disappears and an error is thrown.
{type: "com.google.gwt.core.client.JavaScriptException",
text: "(TypeError) : Cannot read property 'hc' of null",
stacktrace: "Unknown.bQ(...graphify/app/layout.js)"}