From 2811d30051ebd7958cbc256da631adad18a0aaa6 Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Sun, 14 Apr 2024 17:48:12 +0200
Subject: [PATCH] [DOM] Add nullcheck on mDoc in GetEventTargetParent

---
 dom/base/nsGlobalWindow.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index 75d3c1861a..3ef2f6cd8c 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -3545,7 +3545,9 @@ nsGlobalWindow::GetEventTargetParent(EventChainPreVisitor& aVisitor)
 
   aVisitor.mCanHandle = true;
   // Middle/right click shouldn't dispatch click event, use auxclick to instead.
-  if (mDoc->IsXULDocument()) {
+  // Note: mDoc should always exist here, but check just in case someone yanked
+  // it out from under us.
+  if (mDoc && mDoc->IsXULDocument()) {
     aVisitor.mForceContentDispatch = true; //FIXME! Bug 329119
   }
   if (msg == eResize && aVisitor.mEvent->IsTrusted()) {