From 84e449502f51e192d337eb793946d5b03f4c6460 Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Fri, 13 Apr 2018 20:57:00 +0200
Subject: moebius#76: JS - DOM - Selection API - crashes

https://github.com/MoonchildProductions/moebius/pull/76
---
 dom/base/nsRange.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'dom/base')

diff --git a/dom/base/nsRange.cpp b/dom/base/nsRange.cpp
index 37ba147af..4b4ce7885 100644
--- a/dom/base/nsRange.cpp
+++ b/dom/base/nsRange.cpp
@@ -3194,7 +3194,7 @@ nsRange::AutoInvalidateSelection::~AutoInvalidateSelection()
   mIsNested = false;
   ::InvalidateAllFrames(mCommonAncestor);
   nsINode* commonAncestor = mRange->GetRegisteredCommonAncestor();
-  if (commonAncestor != mCommonAncestor) {
+  if (commonAncestor && commonAncestor != mCommonAncestor) {
     ::InvalidateAllFrames(commonAncestor);
   }
 }
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