From 6135f4f78ea034cb3661ebcdd3cf37df275d3557 Mon Sep 17 00:00:00 2001
From: ellenaua <elenasharovar@gmail.com>
Date: Wed, 18 Apr 2018 04:58:05 +0300
Subject: [PATCH] Removed default value for groupReaders

---
 moment-timezone-utils.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/moment-timezone-utils.js b/moment-timezone-utils.js
index e48fd844..1879599f 100644
--- a/moment-timezone-utils.js
+++ b/moment-timezone-utils.js
@@ -172,7 +172,7 @@
 		return arraysAreEqual(a.offsets, b.offsets) && arraysAreEqual(a.abbrs, b.abbrs) && arraysAreEqual(a.untils, b.untils);
 	}
 
-	function findAndCreateLinks (input, output, links, groupLeaders = {}) {
+	function findAndCreateLinks (input, output, links, groupLeaders) {
 		var i, j, a, b, group, foundGroup, groups = [];
 
 		for (i = 0; i < input.length; i++) {
@@ -185,7 +185,7 @@
 				if (zonesAreEqual(a, b)) {
 					if (a.population > b.population) {
 						group.unshift(a);
-					} else if (a.population === b.population && groupLeaders[a.name]) {
+					} else if (a.population === b.population && groupLeaders && groupLeaders[a.name]) {
                         group.unshift(a);
                     } else {
 						group.push(a);
@@ -208,7 +208,7 @@
 		}
 	}
 
-	function createLinks (source, groupLeaders = {}) {
+	function createLinks (source, groupLeaders) {
 		var zones = [],
 			links = [];
 
@@ -281,7 +281,7 @@
 		Filter, Link, and Pack
 	************************************/
 
-	function filterLinkPack (input, start, end, groupLeaders = {}) {
+	function filterLinkPack (input, start, end, groupLeaders) {
 		var i,
 			inputZones = input.zones,
 			outputZones = [],