From 466868e63919d6fabb8d75caca930fd348c1908f Mon Sep 17 00:00:00 2001
From: Nathan Sobo <nathan@github.com>
Date: Thu, 9 Jan 2014 10:47:07 -0700
Subject: [PATCH] Fix access to undefined root property

The ::filterDefined transform unfortunately doesn't prevent an undefined
initial value when applied to behaviors.
---
 src/pane-container-model.coffee | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/pane-container-model.coffee b/src/pane-container-model.coffee
index d4029886e..10ab34292 100644
--- a/src/pane-container-model.coffee
+++ b/src/pane-container-model.coffee
@@ -14,9 +14,10 @@ class PaneContainerModel extends Model
 
   constructor: ->
     super
-    @subscribe @$root.filterDefined(), (root) =>
-      root.parent = this
-      root.focusContext = @focusContext
+    @subscribe @$root, (root) =>
+      if root?
+        root.parent = this
+        root.focusContext = @focusContext
 
   deserializeParams: (params) ->
     params.root = atom.deserializers.deserialize(params.root)