If responsive is enabled, errors happen when chart is removed from DOM.

[offsky]

If a responsive chart is removed from the DOM without calling destroy() on it first, and then the window is resized, Chart.js will start throwing errors. Maybe this isn't important because the library is being misused by not calling destroy() like a good citizen, but it would be easy to fix.

getMaximumWidth = helpers.getMaximumWidth = function(domNode){
    var container = domNode.parentNode;
    // TODO = check cross browser stuff with this.
    if(!container) return 0; //ADD THIS LINE
    return container.clientWidth;
},
getMaximumHeight = helpers.getMaximumHeight = function(domNode){
    var container = domNode.parentNode;
    // TODO = check cross browser stuff with this.
    if(!container) return 0; //ADD THIS LINE
    return container.clientHeight;
},