From ea9e25798921622d98f4746791bea8e3c7a4e308 Mon Sep 17 00:00:00 2001
From: roytam1 <roytam@gmail.com>
Date: Mon, 25 May 2026 23:43:09 +0800
Subject: [PATCH] Revert "ported from UXP: Issue #3092 - Implement
 BackgroundFinalizeTask for parallel garbage collection finalization
 (c0677633)"

This reverts commit fd2399f50d8e7fbe346afbc26689171a94659e6b.
---
 js/src/jsgc.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/js/src/jsgc.cpp b/js/src/jsgc.cpp
index 8893cffce..7fd1978e9 100644
--- a/js/src/jsgc.cpp
+++ b/js/src/jsgc.cpp
@@ -4529,8 +4529,10 @@ PrepareWeakCacheTasks(JSRuntime* rt)
     WeakCacheTaskVector out;
     for (GCZoneGroupIter zone(rt); !zone.done(); zone.next()) {
         for (JS::WeakCache<void*>* cache : zone->weakCaches_) {
-            if (!out.emplaceBack(rt, *cache))
-                return out;
+            if (!out.append(SweepWeakCacheTask(rt, *cache))) {
+                SweepWeakCachesFromMainThread(rt);
+                return WeakCacheTaskVector();
+            }
         }
     }
     return out;