From a22611a60ef1c859abe3f793cbcac5bfd1755ef0 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Sun, 29 Mar 2026 17:47:51 -0400
Subject: [PATCH] fix

---
 packages/svelte/src/internal/client/reactivity/deriveds.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/svelte/src/internal/client/reactivity/deriveds.js b/packages/svelte/src/internal/client/reactivity/deriveds.js
index 7e3f610d62..dc4f52080c 100644
--- a/packages/svelte/src/internal/client/reactivity/deriveds.js
+++ b/packages/svelte/src/internal/client/reactivity/deriveds.js
@@ -253,8 +253,8 @@ export function async_derived(fn, label, location) {
 	return new Promise((fulfil) => {
 		/** @param {Promise<V>} p */
 		function next(p) {
-			function go() {
-				if (p === promise) {
+			function go(v) {
+				if (p === promise || v !== STALE_REACTION) {
 					fulfil(signal);
 				} else {
 					// if the effect re-runs before the initial promise