From 1430ebaf067f7420030651774224f28602814b88 Mon Sep 17 00:00:00 2001
From: Emily Eisenberg <emily@khanacademy.org>
Date: Mon, 22 Jul 2013 14:46:13 -0700
Subject: [PATCH] Make ParseErrors differentiable from other Errors

Auditors: alpert
---
 ParseError.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ParseError.js b/ParseError.js
index 602597610..6a561f478 100644
--- a/ParseError.js
+++ b/ParseError.js
@@ -1,7 +1,10 @@
 function ParseError(message) {
-    this.message = "TeX parse error: " + message;
+    var self = new Error("TeX parse error: " + message);
+    self.name = "ParseError";
+    self.__proto__ = ParseError.prototype;
+    return self;
 }
 
-ParseError.prototype = Error.prototype;
+ParseError.prototype.__proto__ = Error.prototype;
 
 module.exports = ParseError;