From 3367ad1ca2a55eafaf5b1caf6a1658a3c375bae7 Mon Sep 17 00:00:00 2001
From: Ruben Verborgh <ruben@verborgh.org>
Date: Sat, 2 Apr 2016 19:30:14 +0200
Subject: [PATCH] _parseError should be an instance of Error.

Fixes a regression introduced by #319
while still providing a fix for #318.
---
 lib/jison.js | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/lib/jison.js b/lib/jison.js
index b47f80a49..d078056ee 100755
--- a/lib/jison.js
+++ b/lib/jison.js
@@ -1359,13 +1359,9 @@ function parseError (str, hash) {
     if (hash.recoverable) {
         this.trace(str);
     } else {
-        function _parseError (msg, hash) {
-            this.message = msg;
-            this.hash = hash;
-        }
-        _parseError.prototype = Error;
-
-        throw new _parseError(str, hash);
+        var error = new Error(str);
+        error.hash = hash;
+        throw error;
     }
 }