From 4b0ec078560c8f51654ef5b4226da4acda659d44 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Fri, 6 Jun 2025 09:59:53 -0400
Subject: [PATCH] turns out we need this

---
 .../svelte/src/internal/client/reactivity/effects.js     | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/packages/svelte/src/internal/client/reactivity/effects.js b/packages/svelte/src/internal/client/reactivity/effects.js
index 6c7c21d7dc..ca1da7f9cd 100644
--- a/packages/svelte/src/internal/client/reactivity/effects.js
+++ b/packages/svelte/src/internal/client/reactivity/effects.js
@@ -114,8 +114,13 @@ function create_effect(type, fn, sync, push = true) {
 	}
 
 	if (sync) {
-		update_effect(effect);
-		effect.f |= EFFECT_RAN;
+		try {
+			update_effect(effect);
+			effect.f |= EFFECT_RAN;
+		} catch (e) {
+			destroy_effect(effect);
+			throw e;
+		}
 	} else if (fn !== null) {
 		schedule_effect(effect);
 	}