From edc2cd320c92a7322d264a086172d89b31bad1fa Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Sat, 11 Apr 2015 20:45:44 -0700
Subject: [PATCH] don't consider eval and arguments valid identifiers - fixes
 #1232

---
 src/babel/types/validators.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/babel/types/validators.js b/src/babel/types/validators.js
index fc1a9e572e..9fb1403c5b 100644
--- a/src/babel/types/validators.js
+++ b/src/babel/types/validators.js
@@ -115,7 +115,10 @@ export function isReferencedIdentifier(node: Object, parent: Object, opts?: Obje
  */
 
 export function isValidIdentifier(name: string): boolean {
-  return isString(name) && esutils.keyword.isIdentifierNameES6(name) && !esutils.keyword.isReservedWordES6(name, true);
+  if (!isString(name)) return false;
+  if (esutils.keyword.isReservedWordES6(name, true)) return false;
+  if (name === "eval" || name === "arguments") return false;
+  return esutils.keyword.isIdentifierNameES6(name);
 }
 
 /**