From 2b166b5e8ddbd60b59fb9b356a79b113c10d844f Mon Sep 17 00:00:00 2001
From: David Roizenman <david@hmnd.io>
Date: Fri, 16 Jan 2026 15:51:13 -0800
Subject: [PATCH] don't flush when already flushing

---
 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 dd9b5e3257..3001d7efc4 100644
--- a/packages/svelte/src/internal/client/reactivity/batch.js
+++ b/packages/svelte/src/internal/client/reactivity/batch.js
@@ -440,7 +440,7 @@ export class Batch {
 
 		if (!this.is_deferred()) {
 			this.revive();
-		} else if (queued_root_effects.length > 0) {
+		} else if (!is_flushing && queued_root_effects.length > 0) {
 			// needed primarily for $effect.pending()
 			this.flush();
 		}