From 138137ddeaca36d4c5e04e7dd75241256f3fc385 Mon Sep 17 00:00:00 2001
From: roytam1 <roytam@gmail.com>
Date: Tue, 14 Dec 2021 23:02:35 +0800
Subject: [PATCH] Issue #unknown, change assignment method in
 `nsThread::SetObserver()`

---
 xpcom/threads/nsThread.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xpcom/threads/nsThread.cpp b/xpcom/threads/nsThread.cpp
index 5e5b89d18f..ed67fa6594 100644
--- a/xpcom/threads/nsThread.cpp
+++ b/xpcom/threads/nsThread.cpp
@@ -1217,7 +1217,8 @@ nsThread::SetObserver(nsIThreadObserver* aObs)
   }
 
   MutexAutoLock lock(mLock);
-  mObserver = aObs;
+  nsCOMPtr<nsIThreadObserver> observer = aObs;
+  mObserver.swap(observer);
   return NS_OK;
 }