From 7d7b3c1dbe748dc2259c3a111a30358b0c818876 Mon Sep 17 00:00:00 2001
From: Alexander Surkov <surkov.alexander@gmail.com>
Date: Wed, 22 Mar 2017 18:31:18 -0400
Subject: [PATCH] Bug 1346518 - extend Accessible::RemoveChild debugging
 assertions, part2, r=yzen

---
 accessible/base/nsAccessibilityService.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/accessible/base/nsAccessibilityService.cpp b/accessible/base/nsAccessibilityService.cpp
index 31eeb4f47ae1..fa7d89002097 100644
--- a/accessible/base/nsAccessibilityService.cpp
+++ b/accessible/base/nsAccessibilityService.cpp
@@ -595,6 +595,7 @@ nsAccessibilityService::ContentRemoved(nsIPresShell* aPresShell,
     }
 
     if (child) {
+      MOZ_DIAGNOSTIC_ASSERT(child->Parent(), "Unattached accessible from tree");
       document->ContentRemoved(child->Parent(), aChildNode);
 #ifdef A11Y_LOG
       if (logging::IsEnabled(logging::eTree))