From 446eaaa15cc768307bcf048d0ebe164df80f62e7 Mon Sep 17 00:00:00 2001
From: Timothy Nikkel <tnikkel@gmail.com>
Date: Thu, 16 May 2024 08:22:31 +0000
Subject: [PATCH] Bug 1897055. Assert SVGDocumentWrapper::DestroyViewer is
 called on main thread. r=layout-reviewers,emilio

Differential Revision: https://phabricator.services.mozilla.com/D210603
---
 image/SVGDocumentWrapper.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/image/SVGDocumentWrapper.cpp b/image/SVGDocumentWrapper.cpp
index 1684c602ecdc..08228c9c708c 100644
--- a/image/SVGDocumentWrapper.cpp
+++ b/image/SVGDocumentWrapper.cpp
@@ -54,6 +54,7 @@ SVGDocumentWrapper::~SVGDocumentWrapper() {
 }
 
 void SVGDocumentWrapper::DestroyViewer() {
+  MOZ_ASSERT(NS_IsMainThread());
   if (mViewer) {
     mViewer->GetDocument()->OnPageHide(false, nullptr);
     mViewer->Close(nullptr);