From 312d2b637b74303237e0f42fc550bfcb384b12ae Mon Sep 17 00:00:00 2001
From: ComputerGuy <63362464+Ocean-OS@users.noreply.github.com>
Date: Tue, 15 Jul 2025 17:10:01 -0700
Subject: [PATCH 1/3] fix: don't log `await_reactivity_loss` warning when
 signal is read in `untrack`

---
 .changeset/big-readers-lie.md                  | 5 +++++
 packages/svelte/src/internal/client/runtime.js | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/big-readers-lie.md

diff --git a/.changeset/big-readers-lie.md b/.changeset/big-readers-lie.md
new file mode 100644
index 000000000000..9f5dd166c1e1
--- /dev/null
+++ b/.changeset/big-readers-lie.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: don't log `await_reactivity_loss` warning when signal is read in `untrack`
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 9fdb87239b45..8fd159107f2a 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -606,7 +606,7 @@ export function get(signal) {
 
 	if (DEV) {
 		if (current_async_effect) {
-			var tracking = (current_async_effect.f & REACTION_IS_UPDATING) !== 0;
+			var tracking = (current_async_effect.f & REACTION_IS_UPDATING) !== 0 && !untracking;
 			var was_read = current_async_effect.deps?.includes(signal);
 
 			if (!tracking && !was_read) {

From 4be5488880fec41e02967d8790c948ab4450d8b5 Mon Sep 17 00:00:00 2001
From: ComputerGuy <63362464+Ocean-OS@users.noreply.github.com>
Date: Tue, 15 Jul 2025 17:17:59 -0700
Subject: [PATCH 2/3] add test

---
 .../samples/async-reactivity-loss/_config.js          |  7 +++++--
 .../samples/async-reactivity-loss/main.svelte         | 11 +++++++----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/_config.js b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/_config.js
index f8a7cfd479af..16318a3b44c2 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/_config.js
@@ -6,11 +6,14 @@ export default test({
 		dev: true
 	},
 
-	html: `<button>a</button><button>b</button><p>pending</p>`,
+	html: `<button>a</button><button>b</button><button>c</button><p>pending</p>`,
 
 	async test({ assert, target, warnings }) {
 		await tick();
-		assert.htmlEqual(target.innerHTML, '<button>a</button><button>b</button><h1>3</h1><p>3</p>');
+		assert.htmlEqual(
+			target.innerHTML,
+			'<button>a</button><button>b</button><button>c</button><h1>6</h1><p>6</p>'
+		);
 
 		assert.equal(
 			warnings[0],
diff --git a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/main.svelte
index bdb1b095c9bc..03596ce05130 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/main.svelte
@@ -1,18 +1,21 @@
 <script>
+	import { untrack } from 'svelte';
 	let a = $state(1);
 	let b = $state(2);
+	let c = $state(3);
 
-	async function a_plus_b() {
-		return await a + await b;
+	async function a_plus_b_plus_c() {
+		return await a + await b + await untrack(() => c);
 	}
 </script>
 
 <button onclick={() => a++}>a</button>
 <button onclick={() => b++}>b</button>
+<button onclick={() => c++}>c</button>
 
 <svelte:boundary>
-	<h1>{await a_plus_b()}</h1>
-	<p>{await a + await b}</p>
+	<h1>{await a_plus_b_plus_c()}</h1>
+	<p>{await a + await b + await c}</p>
 
 	{#snippet pending()}
 		<p>pending</p>

From 29e2c852a1425c0b51b90b361b33c267f5f46f75 Mon Sep 17 00:00:00 2001
From: ComputerGuy <63362464+Ocean-OS@users.noreply.github.com>
Date: Tue, 15 Jul 2025 17:29:51 -0700
Subject: [PATCH 3/3] fix

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

diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 8fd159107f2a..6c4d92bbadf5 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -606,10 +606,10 @@ export function get(signal) {
 
 	if (DEV) {
 		if (current_async_effect) {
-			var tracking = (current_async_effect.f & REACTION_IS_UPDATING) !== 0 && !untracking;
+			var tracking = (current_async_effect.f & REACTION_IS_UPDATING) !== 0;
 			var was_read = current_async_effect.deps?.includes(signal);
 
-			if (!tracking && !was_read) {
+			if (!tracking && !untracking && !was_read) {
 				w.await_reactivity_loss(/** @type {string} */ (signal.label));
 
 				var trace = get_stack('TracedAt');