From e318f5f3be32bbd7236f3de1f11b5fe66882db60 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 13 May 2015 08:44:33 +0100
Subject: [PATCH] use ReferencedIdentifier virtual type in
 minification.deadCodeElimination transformer

---
 .../transformers/minification/dead-code-elimination.js        | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/babel/transformation/transformers/minification/dead-code-elimination.js b/src/babel/transformation/transformers/minification/dead-code-elimination.js
index 8f17b338df..7736f2745d 100644
--- a/src/babel/transformation/transformers/minification/dead-code-elimination.js
+++ b/src/babel/transformation/transformers/minification/dead-code-elimination.js
@@ -22,9 +22,7 @@ export var metadata = {
   group: "builtin-setup"
 };
 
-export function Identifier(node, parent, scope) {
-  if (!this.isReferenced()) return;
-
+export function ReferencedIdentifier(node, parent, scope) {
   var binding = scope.getBinding(node.name);
   if (!binding || binding.references > 1 || !binding.constant) return;
   if (binding.kind === "param") return;