From ff1ba9e091141c08e9ce8a95c553735b4dc07afe Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Wed, 6 May 2026 11:30:03 -0400
Subject: [PATCH] skip work when obsolete

---
 packages/svelte/src/internal/client/reactivity/deriveds.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/svelte/src/internal/client/reactivity/deriveds.js b/packages/svelte/src/internal/client/reactivity/deriveds.js
index 7681bebd3b..32527836df 100644
--- a/packages/svelte/src/internal/client/reactivity/deriveds.js
+++ b/packages/svelte/src/internal/client/reactivity/deriveds.js
@@ -213,6 +213,10 @@ export function async_derived(fn, label, location) {
 
 			decrement_pending?.();
 
+			if (error === OBSOLETE) {
+				return;
+			}
+
 			batch.activate();
 
 			if (error) {