From e12b37701495edc25bcf6aa20c75515c0b0a6fa8 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 13 Apr 2015 14:26:06 -0700
Subject: [PATCH] don't fall back to runtime catch all on locally declared
 variables

---
 src/babel/transformation/transformers/other/runtime/index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/babel/transformation/transformers/other/runtime/index.js b/src/babel/transformation/transformers/other/runtime/index.js
index 6c137e49ba..0f88697867 100644
--- a/src/babel/transformation/transformers/other/runtime/index.js
+++ b/src/babel/transformation/transformers/other/runtime/index.js
@@ -81,6 +81,7 @@ var astVisitor = traverse.explode({
       var obj  = node.object;
 
       if (!has(definitions.builtins, obj.name)) return;
+      if (scope.getBindingIdentifier(obj.name)) return;
 
       var modulePath = definitions.builtins[obj.name];
       return t.memberExpression(