From f93685811a2f8ef15d5462f40575975f706eeffc Mon Sep 17 00:00:00 2001
From: Feross Aboukhadijeh <feross@feross.org>
Date: Thu, 14 Apr 2016 16:06:24 -0700
Subject: [PATCH] handle case where cb is undefined

---
 renderer/lib/location-history.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/renderer/lib/location-history.js b/renderer/lib/location-history.js
index c57cc82f..96efdf0b 100644
--- a/renderer/lib/location-history.js
+++ b/renderer/lib/location-history.js
@@ -20,7 +20,10 @@ LocationHistory.prototype._go = function (page, cb) {
     page.onbeforeload((err) => {
       if (this._pending !== page) return /* navigation was cancelled */
       this._pending = null
-      if (err) return cb(err)
+      if (err) {
+        if (cb) cb(err)
+        return
+      }
       this._history.push(page)
       if (cb) cb()
     })