From b5c1db9ad9901585e397492888b6320b724298fe Mon Sep 17 00:00:00 2001
From: Cheng Zhao <zcbenz@gmail.com>
Date: Thu, 21 Apr 2016 11:17:12 +0900
Subject: [PATCH] Guard against unexist owner when removing ref to remote
 object

---
 lib/browser/objects-registry.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/browser/objects-registry.js b/lib/browser/objects-registry.js
index b8aa480..adbf683 100644
--- a/lib/browser/objects-registry.js
+++ b/lib/browser/objects-registry.js
@@ -50,7 +50,10 @@ class ObjectsRegistry {
     this.dereference(id)
 
     // Also remove the reference in owner.
-    this.owners[webContentsId].delete(id)
+    let owner = this.owners[webContentsId]
+    if (owner) {
+      owner.delete(id)
+    }
   }
 
   // Clear all references to objects refrenced by the WebContents.
-- 
2.7.4