From 98bd5270f0b0957216f803f1bcb0df795f77afdb Mon Sep 17 00:00:00 2001
From: "S. Elliott Johnson" <sejohnson@torchcloudconsulting.com>
Date: Tue, 9 Sep 2025 17:03:43 -0600
Subject: [PATCH 1/3] failing test

---
 .../samples/error-boundary-23/_config.js      | 14 ++++++++++++
 .../samples/error-boundary-23/main.svelte     |  7 ++++++
 .../samples/error-boundary-23/test.svelte     | 22 +++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 packages/svelte/tests/runtime-runes/samples/error-boundary-23/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte

diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/_config.js b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/_config.js
new file mode 100644
index 000000000000..fd51be3ca1d1
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/_config.js
@@ -0,0 +1,14 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	test({ assert, target, logs }) {
+		let btn = target.querySelector('button');
+
+		btn?.click();
+		btn?.click();
+		flushSync();
+
+		assert.deepEqual(logs, ['error caught 1', 'error caught 2']);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
new file mode 100644
index 000000000000..3c599e2aa706
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
@@ -0,0 +1,7 @@
+<script lang="ts"> 
+  import Test from './test.svelte';
+</script>
+
+<svelte:boundary onerror={(e) => {console.log(e.stack)}}>
+  <Test />
+</svelte:boundary>
diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
new file mode 100644
index 000000000000..e24a94220fd1
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
@@ -0,0 +1,22 @@
+<script>
+	let count = $state(0);
+
+	let test = $derived.by(() => {
+		if (count > 1) {
+			throw new Error('test');
+		}
+	});
+</script>
+
+<svelte:boundary onerror={(e) => {console.log('error caught 1')}}>
+		<div>Count: {count}</div>
+		<button onclick={() => count++}>Increment</button>
+		{count} / {test}
+</svelte:boundary>
+
+
+<svelte:boundary onerror={(e) => {console.log('error caught 2')}}>
+		<div>Count: {count}</div>
+		<button onclick={() => count++}>Increment</button>
+		{count} / {test}
+</svelte:boundary>

From 32b51b286c3fe5bf565bc4afe79ef1522578d1a4 Mon Sep 17 00:00:00 2001
From: "S. Elliott Johnson" <sejohnson@torchcloudconsulting.com>
Date: Tue, 9 Sep 2025 17:08:40 -0600
Subject: [PATCH 2/3] better

---
 .../tests/runtime-runes/samples/error-boundary-23/main.svelte   | 2 +-
 .../tests/runtime-runes/samples/error-boundary-23/test.svelte   | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
index 3c599e2aa706..7db56fe8e15f 100644
--- a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/main.svelte
@@ -2,6 +2,6 @@
   import Test from './test.svelte';
 </script>
 
-<svelte:boundary onerror={(e) => {console.log(e.stack)}}>
+<svelte:boundary onerror={(e) => {console.log('error caught root')}}>
   <Test />
 </svelte:boundary>
diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
index e24a94220fd1..4ac2a1d380a6 100644
--- a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
@@ -14,7 +14,6 @@
 		{count} / {test}
 </svelte:boundary>
 
-
 <svelte:boundary onerror={(e) => {console.log('error caught 2')}}>
 		<div>Count: {count}</div>
 		<button onclick={() => count++}>Increment</button>

From 602b885bc6ee570006f8849113d37ff9959d908d Mon Sep 17 00:00:00 2001
From: "S. Elliott Johnson" <sejohnson@torchcloudconsulting.com>
Date: Tue, 9 Sep 2025 17:09:10 -0600
Subject: [PATCH 3/3] better

---
 .../runtime-runes/samples/error-boundary-23/test.svelte     | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
index 4ac2a1d380a6..e84b917f1626 100644
--- a/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/error-boundary-23/test.svelte
@@ -13,9 +13,3 @@
 		<button onclick={() => count++}>Increment</button>
 		{count} / {test}
 </svelte:boundary>
-
-<svelte:boundary onerror={(e) => {console.log('error caught 2')}}>
-		<div>Count: {count}</div>
-		<button onclick={() => count++}>Increment</button>
-		{count} / {test}
-</svelte:boundary>