From 51518a7149504550f4785b14eb1f2caef3cdcfce Mon Sep 17 00:00:00 2001
From: Evert Timberg <evert.timberg+github@gmail.com>
Date: Sat, 30 Jul 2016 09:41:35 -0400
Subject: [PATCH] Handle possibility of a undefined arc element in the doughnut
 chart

---
 src/controllers/controller.doughnut.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/controllers/controller.doughnut.js b/src/controllers/controller.doughnut.js
index 32fc3e7ce..637caea37 100644
--- a/src/controllers/controller.doughnut.js
+++ b/src/controllers/controller.doughnut.js
@@ -46,7 +46,7 @@ module.exports = function(Chart) {
 							var meta = chart.getDatasetMeta(0);
 							var ds = data.datasets[0];
 							var arc = meta.data[i];
-							var custom = arc.custom || {};
+							var custom = arc && arc.custom || {};
 							var getValueAtIndexOrDefault = helpers.getValueAtIndexOrDefault;
 							var arcOpts = chart.options.elements.arc;
 							var fill = custom.backgroundColor ? custom.backgroundColor : getValueAtIndexOrDefault(ds.backgroundColor, i, arcOpts.backgroundColor);
@@ -253,6 +253,10 @@ module.exports = function(Chart) {
 				}
 			});
 
+			/*if (total === 0) {
+				total = NaN;
+			}*/
+
 			return total;
 		},
 
-- 
2.47.2