From 4bb907aa22396b861208a960bfab218eea6ac9a1 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 17 Aug 2023 18:34:27 +0200
Subject: [PATCH] LibWeb: Only propagate overflow from document element when it
 exists

---
 Userland/Libraries/LibWeb/DOM/Document.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 2b1cfba113..d218d55a1d 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -974,7 +974,9 @@ void Document::update_layout()
         m_layout_root = verify_cast<Layout::Viewport>(*tree_builder.build(*this));
     }
 
-    propagate_overflow_to_viewport(*document_element(), *m_layout_root);
+    if (auto* document_element = this->document_element()) {
+        propagate_overflow_to_viewport(*document_element, *m_layout_root);
+    }
 
     Layout::LayoutState layout_state;