From fdf09b88f255a90e81cf30ec97c49b6904af3c6d Mon Sep 17 00:00:00 2001
From: Matt Woodrow <mwoodrow@mozilla.com>
Date: Thu, 12 Oct 2017 13:10:27 +1300
Subject: [PATCH] Bug 1261175. r=tnikkel, a=abillings

---
 view/nsViewManager.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/view/nsViewManager.cpp b/view/nsViewManager.cpp
index f3540f3478da..230512c0dcc0 100644
--- a/view/nsViewManager.cpp
+++ b/view/nsViewManager.cpp
@@ -100,7 +100,7 @@ nsViewManager::~nsViewManager()
     gViewManagers = nullptr;
   }
 
-  mPresShell = nullptr;
+  MOZ_RELEASE_ASSERT(!mPresShell, "Releasing nsViewManager without having called Destroy on the PresShell!");
 }
 
 // We don't hold a reference to the presentation context because it