From 8f4c4be8219932fdcbad4b23134b707de203846c Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 19 Nov 2014 12:40:35 +1100
Subject: [PATCH] generator: add existence check to printJoin

---
 lib/6to5/generation/generator.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/6to5/generation/generator.js b/lib/6to5/generation/generator.js
index 82fce1f967..73511ec6a6 100644
--- a/lib/6to5/generation/generator.js
+++ b/lib/6to5/generation/generator.js
@@ -165,6 +165,8 @@ CodeGenerator.prototype.print = function (node, parent, opts) {
 };
 
 CodeGenerator.prototype.printJoin = function (print, nodes, opts) {
+  if (!nodes || !nodes.length) return;
+
   opts = opts || {};
 
   var self = this;