From 066806b1795ac6b6b78d216ddf625fac3d24fb15 Mon Sep 17 00:00:00 2001
From: Aaron Klotz <aklotz@mozilla.com>
Date: Wed, 6 Sep 2017 10:40:55 -0600
Subject: [PATCH] Bug 1383501: Assert that com proxy is non-null before calling
 SendPDocAccessibleConstructor; r=yzen

MozReview-Commit-ID: CuIXyoe4jsj
---
 accessible/generic/DocAccessible.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/accessible/generic/DocAccessible.cpp b/accessible/generic/DocAccessible.cpp
index 260b039fb73e..432291158a03 100644
--- a/accessible/generic/DocAccessible.cpp
+++ b/accessible/generic/DocAccessible.cpp
@@ -1503,6 +1503,7 @@ DocAccessible::DoInitialUpdate()
 
 #if defined(XP_WIN)
         IAccessibleHolder holder(CreateHolderFromAccessible(this));
+        MOZ_DIAGNOSTIC_ASSERT(!holder.IsNull());
         int32_t childID = AccessibleWrap::GetChildIDFor(this);
 #else
         int32_t holder = 0, childID = 0;