From 30e39084846dbf97e0bdb5ebe3df0e8e6ba0e7b9 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Fri, 15 May 2015 18:48:05 +0100
Subject: [PATCH] don't perform DCE on single references nested inside the
 binding initializer - fixes #1546

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

diff --git a/src/babel/transformation/transformers/minification/dead-code-elimination.js b/src/babel/transformation/transformers/minification/dead-code-elimination.js
index 5bbb5c8936..6927948231 100644
--- a/src/babel/transformation/transformers/minification/dead-code-elimination.js
+++ b/src/babel/transformation/transformers/minification/dead-code-elimination.js
@@ -33,6 +33,10 @@ export function ReferencedIdentifier(node, parent, scope) {
   }
   if (!replacement) return;
 
+  if (this.findParent((node) => replacement)) {
+    return;
+  }
+
   t.toExpression(replacement);
   scope.removeBinding(node.name);
   binding.path.remove();