From 3a917c1b03cbd920174bbd0d8cbf0a478341c1e3 Mon Sep 17 00:00:00 2001
From: Marijn Ophorst <marijn@sensimedia.nl>
Date: Tue, 13 May 2014 08:57:56 +0200
Subject: [PATCH] wrap this in an isset check, callbacks is sometimes missing
 (prolly due to expired sessions?)

---
 src/DNode/Session.php | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/src/DNode/Session.php b/src/DNode/Session.php
index e8ed636..2ea08c7 100644
--- a/src/DNode/Session.php
+++ b/src/DNode/Session.php
@@ -163,21 +163,23 @@ private function scrub($obj)
     private function unscrub($msg) {
         $args = $msg->arguments;
         $session = $this;
-        foreach ($msg->callbacks as $id => $path) {
-            if (!isset($this->wrapped[$id])) {
-                $this->wrapped[$id] = function() use ($session, $id) {
-                    $session->request((int) $id, func_get_args());
-                };
-            }
-            $location =& $args;
-            foreach ($path as $part) {
-                if (is_array($location)) {
-                    $location =& $location[$part];
-                    continue;
+        if (isset($msg->callbacks)) {
+            foreach ($msg->callbacks as $id => $path) {
+                if (!isset($this->wrapped[$id])) {
+                    $this->wrapped[$id] = function() use ($session, $id) {
+                        $session->request((int) $id, func_get_args());
+                    };
+                }
+                $location =& $args;
+                foreach ($path as $part) {
+                    if (is_array($location)) {
+                        $location =& $location[$part];
+                        continue;
+                    }
+                    $location =& $location->$part;
                 }
-                $location =& $location->$part;
+                $location = $this->wrapped[$id];
             }
-            $location = $this->wrapped[$id];
         }
         return $args;
     }