Handle a frozen dataset.data array.

docs/developers/updates.md

@@ -4,7 +4,7 @@ It's pretty common to want to update charts after they've been created. When the
 
 ## Adding or Removing Data
 
-Adding and removing data is supported by changing the data array. To add data, just add data into the data array as seen in this example.
+Adding and removing data is supported by changing the data array. To add data, just add data into the data array as seen in this example. However, if `dataset.data` has been frozen using `Object.freeze()`, adding or removing data will not update the chart.
 
 ```javascript
 function addData(chart, label, data) {

src/core/core.datasetController.js

@@ -225,7 +225,9 @@ helpers.extend(DatasetController.prototype, {
 				unlistenArrayEvents(me._data, me);
 			}
 
-			listenArrayEvents(data, me);
+			if (data && !Object.isFrozen(data)) {
+				listenArrayEvents(data, me);
+			}
 			me._data = data;
 		}
 

test/specs/core.datasetController.tests.js

@@ -38,6 +38,22 @@ describe('Chart.DatasetController', function() {
 		});
 	});
 
+	it('should handle a frozen data object', function() {
+		function createChart() {
+			var data = Object.freeze([0, 1, 2, 3, 4, 5]);
+			acquireChart({
+				type: 'line',
+				data: {
+					datasets: [{
+						data: data
+					}]
+				}
+			});
+		}
+
+		expect(createChart).not.toThrow();
+	});
+
 	it('should synchronize metadata when data are inserted or removed', function() {
 		var data = [0, 1, 2, 3, 4, 5];
 		var chart = acquireChart({