v1.14.11

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.14.10
+
+ * Fix let scoping unneccesary override.
+
 # 1.14.6
 
  * Avoid ensuring a block on non-array node replacements.

lib/6to5/traverse/scope.js

@@ -23,7 +23,7 @@ function Scope(block, parent) {
 
 Scope.add = function (node, references) {
   if (!node) return;
-  _.merge(references, t.getIds(node, true));
+  _.defaults(references, t.getIds(node, true));
 };
 
 Scope.prototype.getReferences = function () {

lib/6to5/types/index.js

@@ -162,7 +162,7 @@ t.toIdentifier = function (name) {
     return c ? c.toUpperCase() : "";
   });
 
-  return name;
+  return name || '_';
 };
 
 t.isValidIdentifier = function (name) {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "6to5",
   "description": "Turn ES6 code into readable vanilla ES5 with source maps",
-  "version": "1.14.10",
+  "version": "1.14.11",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://github.com/6to5/6to5",
   "repository": {