From f845a9b2c45960e2ac30c4a64189e61301af1547 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 9 Feb 2015 08:25:58 +1100
Subject: [PATCH] ignore binding elements when finding the last non-default
 param - fixes #723

---
 .../transformation/transformers/es6/parameters.default.js     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/6to5/transformation/transformers/es6/parameters.default.js b/lib/6to5/transformation/transformers/es6/parameters.default.js
index f5a393fef2..942e3139cf 100644
--- a/lib/6to5/transformation/transformers/es6/parameters.default.js
+++ b/lib/6to5/transformation/transformers/es6/parameters.default.js
@@ -55,7 +55,9 @@ exports.Function = function (node, parent, scope, file) {
     var param = node.params[i];
 
     if (!t.isAssignmentPattern(param)) {
-      lastNonDefaultParam = i + 1;
+      if (!t.isBindingElement(param)) {
+        lastNonDefaultParam = i + 1;
+      }
 
       if (!t.isIdentifier(param)) {
         scope.traverse(param, iifeVisitor, state);