v1.14.8

lib/6to5/register.js

@@ -79,8 +79,11 @@ var loader = function (m, filename) {
 
   var result;
 
-  if (cache && cache[filename].mtime === mtime(filename)) {
-    result = cache[filename];
+  if (cache) {
+    var cached = cache[filename];
+    if (cached && cached.mtime === mtime(filename)) {
+      result = cached;
+    }
   }
 
   result = result || to5.transformFileSync(filename, _.extend({

package.json

@@ -1,7 +1,7 @@
 {
   "name": "6to5",
   "description": "Turn ES6 code into readable vanilla ES5 with source maps",
-  "version": "1.14.7",
+  "version": "1.14.8",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://github.com/6to5/6to5",
   "repository": {