From c5fa6425a5aa769893f397a4c3b039fd83d7168d Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 29 Dec 2014 01:25:15 +1100
Subject: [PATCH] explicit canRun for hidden transformers

---
 lib/6to5/transformation/transformer.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/lib/6to5/transformation/transformer.js b/lib/6to5/transformation/transformer.js
index 43f5a1b7c7..675b2743f2 100644
--- a/lib/6to5/transformation/transformer.js
+++ b/lib/6to5/transformation/transformer.js
@@ -72,14 +72,13 @@ Transformer.prototype.transform = function (file) {
 Transformer.prototype.canRun = function (file) {
   var opts = file.opts;
   var key  = this.key;
+  if (key[0] === "_") return true;
 
   var blacklist = opts.blacklist;
   if (blacklist.length && _.contains(blacklist, key)) return false;
 
-  if (key[0] !== "_") {
-    var whitelist = opts.whitelist;
-    if (whitelist.length && !_.contains(whitelist, key)) return false;
-  }
+  var whitelist = opts.whitelist;
+  if (whitelist.length && !_.contains(whitelist, key)) return false;
 
   return true;
 };