From 31d2695f81dc1b967ed14424652c94c84b48d369 Mon Sep 17 00:00:00 2001
From: Timothy Nikkel <tnikkel@gmail.com>
Date: Thu, 8 Sep 2022 03:29:36 +0000
Subject: [PATCH] Bug 1786818. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D155462
---
 dom/base/nsDOMWindowUtils.cpp | 2 +-
 image/SVGDocumentWrapper.cpp  | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/dom/base/nsDOMWindowUtils.cpp b/dom/base/nsDOMWindowUtils.cpp
index e3f0cb18cf74..2396139df4c7 100644
--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -2803,7 +2803,7 @@ nsDOMWindowUtils::AdvanceTimeAndRefresh(int64_t aMilliseconds) {
 
   nsPresContext* presContext = GetPresContext();
   if (presContext) {
-    nsRefreshDriver* driver = presContext->RefreshDriver();
+    RefPtr<nsRefreshDriver> driver = presContext->RefreshDriver();
     driver->AdvanceTimeAndRefresh(aMilliseconds);
 
     if (WebRenderBridgeChild* wrbc = GetWebRenderBridge()) {
diff --git a/image/SVGDocumentWrapper.cpp b/image/SVGDocumentWrapper.cpp
index a85176db49e1..2c081afb9ec5 100644
--- a/image/SVGDocumentWrapper.cpp
+++ b/image/SVGDocumentWrapper.cpp
@@ -180,7 +180,9 @@ void SVGDocumentWrapper::SetCurrentTime(float aTime) {
 void SVGDocumentWrapper::TickRefreshDriver() {
   if (RefPtr<PresShell> presShell = mViewer->GetPresShell()) {
     if (RefPtr<nsPresContext> presContext = presShell->GetPresContext()) {
-      presContext->RefreshDriver()->DoTick();
+      if (RefPtr<nsRefreshDriver> driver = presContext->RefreshDriver()) {
+        driver->DoTick();
+      }
     }
   }
 }