From c587dc023de2270cb78fb0a828c5d49a0b786edc Mon Sep 17 00:00:00 2001
From: Eden Chuang <echuang@mozilla.com>
Date: Sat, 3 May 2025 15:21:06 +0000
Subject: [PATCH] Bug 1964033 - Update the ServiceWorkerShutdown progress setup
 assertion. r=dom-worker-reviewers,asuth

Differential Revision: https://phabricator.services.mozilla.com/D247580
---
 dom/serviceworkers/ServiceWorkerShutdownState.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dom/serviceworkers/ServiceWorkerShutdownState.cpp b/dom/serviceworkers/ServiceWorkerShutdownState.cpp
index 686f31487703..606b21626f1f 100644
--- a/dom/serviceworkers/ServiceWorkerShutdownState.cpp
+++ b/dom/serviceworkers/ServiceWorkerShutdownState.cpp
@@ -62,8 +62,12 @@ const char* ServiceWorkerShutdownState::GetProgressString() const {
 
 void ServiceWorkerShutdownState::SetProgress(Progress aProgress) {
   MOZ_ASSERT(aProgress != Progress::EndGuard_);
+  // The Shutdown progress should be increased step by step. However, it could
+  // directly get into ShutdownCompleted state when shutting down starts during
+  // ServiceWorker spawning.
   MOZ_RELEASE_ASSERT(UnderlyingProgressValue(mProgress) + 1 ==
-                     UnderlyingProgressValue(aProgress));
+                         UnderlyingProgressValue(aProgress) ||
+                     aProgress == Progress::ShutdownCompleted);
 
   mProgress = aProgress;
 }