diff --git a/src/groups/membership.js b/src/groups/membership.js
index 86e8102be7..9d76e1dc7b 100644
--- a/src/groups/membership.js
+++ b/src/groups/membership.js
@@ -284,14 +284,11 @@ module.exports = function (Groups) {
 	};
 
 	Groups.isMemberOfGroupsList = function (uid, groupListKeys, callback) {
-		var sets = groupListKeys.map(function (groupName) {
-			return 'group:' + groupName + ':members';
-		});
-
 		var uniqueGroups;
 		var members;
 		async.waterfall([
 			function (next) {
+				const sets = groupListKeys.map(groupName => 'group:' + groupName + ':members');
 				db.getSortedSetsMembers(sets, next);
 			},
 			function (_members, next) {
diff --git a/src/plugins/index.js b/src/plugins/index.js
index 5dae04c706..1462f89faa 100644
--- a/src/plugins/index.js
+++ b/src/plugins/index.js
@@ -45,7 +45,7 @@ module.require = function (p) {
 		// if we can't find the module try in parent directory
 		// since plugins.js moved into plugins folder
 		if (err.code === 'MODULE_NOT_FOUND') {
-			winston.warn('[plugins/require] ' + err.message + ', please update your plugin!\n' + err.stack.split('\n')[5]);
+			winston.warn('[plugins/require] ' + err.message + ', please update your plugin!\n' + err.stack.split('\n').slice(4, 7).join('\n'));
 			if (path.isAbsolute(p)) {
 				throw err;
 			}