From adc46efc655992d902cecc895b3d9bfe5b44db9e Mon Sep 17 00:00:00 2001
From: Patrick Steele-Idem <pnidem@gmail.com>
Date: Thu, 6 Nov 2014 13:32:44 -0700
Subject: [PATCH] Only invoke callback once in case of an error

---
 runtime/marko-runtime.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/runtime/marko-runtime.js b/runtime/marko-runtime.js
index 57185e74c..f64e3d81d 100644
--- a/runtime/marko-runtime.js
+++ b/runtime/marko-runtime.js
@@ -82,7 +82,7 @@ Template.prototype = {
                 callback(null, out.getOutput());
             });
 
-            out.on('error', callback);
+            out.once('error', callback);
         } else if (!out || !out.isAsyncWriter) {
             var stream = out;
             // Assume the "out" is really a stream