From d69a3c3c1c4d81044f85cf4b4d46e0e41ca1558d Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 13 Oct 2026 10:20:15 -0400
Subject: [PATCH] Update
 packages/svelte/src/internal/client/reactivity/batch.js

---
 packages/svelte/src/internal/client/reactivity/batch.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/svelte/src/internal/client/reactivity/batch.js b/packages/svelte/src/internal/client/reactivity/batch.js
index 21ec9c833f..9d2a861148 100644
--- a/packages/svelte/src/internal/client/reactivity/batch.js
+++ b/packages/svelte/src/internal/client/reactivity/batch.js
@@ -998,7 +998,7 @@ export class Batch {
 			wv_values.set(source, current.wv);
 		}
 
-		for (const [effect, wv] of this.stale_effects) {
+		for (const [effect, wv] of this.#stale_effects ?? []) {
 			wv_values.set(effect, wv);
 		}