From c4a1657bd7c26e751e214eca839b4d9011707dd3 Mon Sep 17 00:00:00 2001
From: razinshafayet <sumonislamk29@gmail.com>
Date: Thu, 11 Dec 2025 18:48:59 +0600
Subject: [PATCH 1/2] chore: add regression test for issue #17277

---
 .../samples/boundary-array-binding/_config.js | 25 +++++++++++++++++++
 .../boundary-array-binding/main.svelte        | 12 +++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/boundary-array-binding/main.svelte

diff --git a/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
new file mode 100644
index 000000000000..6c7dfe110d94
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
@@ -0,0 +1,25 @@
+export default {
+	// 🔴 THIS IS THE KEY: Force production mode to trigger the bug
+	compileOptions: {
+        dev: false,
+        immutable: true // strict mode
+    },
+	async test({ assert, target, window }) {
+		// 1. Wait for the async await block to resolve
+		await Promise.resolve();
+		await Promise.resolve();
+
+		const input = target.querySelector('input');
+		const p = target.querySelector('p');
+
+		// 2. Simulate user typing "updated"
+		input.value = 'updated';
+		input.dispatchEvent(new window.Event('input'));
+		
+		// 3. Wait for reactivity
+		await Promise.resolve();
+
+		// 4. Assert
+		assert.equal(p.innerHTML, 'Value: updated');
+	}
+};
\ No newline at end of file
diff --git a/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/main.svelte b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/main.svelte
new file mode 100644
index 000000000000..d00d2da06133
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/main.svelte
@@ -0,0 +1,12 @@
+<script>
+	let items = $state(['initial']);
+</script>
+
+<svelte:boundary onerror={() => {}}>
+	{#await Promise.resolve()}
+		{:then}
+			<input bind:value={items[0]} />
+		{/await}
+</svelte:boundary>
+
+<p>Value: {items[0]}</p>
\ No newline at end of file

From 2194c7ea3c99d5e098762ffcf28fcedf1cb304c7 Mon Sep 17 00:00:00 2001
From: razinshafayet <sumonislamk29@gmail.com>
Date: Thu, 11 Dec 2025 19:03:06 +0600
Subject: [PATCH 2/2] chore: fix types and formatting

---
 .../samples/boundary-array-binding/_config.js         | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
index 6c7dfe110d94..89ffb9e0d74f 100644
--- a/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/boundary-array-binding/_config.js
@@ -1,9 +1,8 @@
+// @ts-nocheck
 export default {
-	// 🔴 THIS IS THE KEY: Force production mode to trigger the bug
 	compileOptions: {
-        dev: false,
-        immutable: true // strict mode
-    },
+		dev: false
+	},
 	async test({ assert, target, window }) {
 		// 1. Wait for the async await block to resolve
 		await Promise.resolve();
@@ -15,11 +14,11 @@ export default {
 		// 2. Simulate user typing "updated"
 		input.value = 'updated';
 		input.dispatchEvent(new window.Event('input'));
-		
+
 		// 3. Wait for reactivity
 		await Promise.resolve();
 
 		// 4. Assert
 		assert.equal(p.innerHTML, 'Value: updated');
 	}
-};
\ No newline at end of file
+};