From 58ba1ac14870d1614cbdd13f9ea157ff22bdd879 Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Fri, 1 May 2015 11:01:31 +0100
Subject: Ensure frames is defined.

When we reinject content scripts into a tab where document.body is a
frameset, no frames are registered, which causes frames to be undefined.
---
 background_scripts/main.coffee | 1 +
 1 file changed, 1 insertion(+)

(limited to 'background_scripts')

diff --git a/background_scripts/main.coffee b/background_scripts/main.coffee
index 3a3392d8..37c65592 100644
--- a/background_scripts/main.coffee
+++ b/background_scripts/main.coffee
@@ -618,6 +618,7 @@ handleFrameFocused = (request, sender) ->
 
 # Rotate through frames to the frame count places after frameId.
 cycleToFrame = (frames, frameId, count = 0) ->
+  frames ||= []
   # We can't always track which frame chrome has focussed, but here we learn that it's frameId; so add an
   # additional offset such that we do indeed start from frameId.
   count = (count + Math.max 0, frames.indexOf frameId) % frames.length
-- 
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