From 772bcf0df6663ccb1bb09ced3607e6407ce8e2ed Mon Sep 17 00:00:00 2001
From: Noah Levitt <nlevitt@archive.org>
Date: Tue, 28 Jun 2016 12:23:32 -0500
Subject: [PATCH] handle "undefined" in list of frames when extracting outlinks
 (fixes ARI-4988)

---
 brozzler/browser.py | 4 +++-
 setup.py            | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/brozzler/browser.py b/brozzler/browser.py
index 40e6036..02b7f3c 100644
--- a/brozzler/browser.py
+++ b/brozzler/browser.py
@@ -290,7 +290,9 @@ var compileOutlinks = function(frame) {
     var outlinks = Array.prototype.slice.call(
             frame.document.querySelectorAll('a[href]'));
     for (var i = 0; i < frame.frames.length; i++) {
-        outlinks = outlinks.concat(compileOutlinks(frame.frames[i]));
+        if (frame.frames[i]) { // sometimes undefined (why?)
+            outlinks = outlinks.concat(compileOutlinks(frame.frames[i]));
+        }
     }
     return outlinks;
 }
diff --git a/setup.py b/setup.py
index 2448f7a..10ab003 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ import setuptools
 
 setuptools.setup(
         name='brozzler',
-        version='1.1.dev25',
+        version='1.1.dev26',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',