From b049086bfde8adc541e1253b4b40c3e1d169b0ea Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Wed, 2 Jul 2025 10:51:21 -0400
Subject: [PATCH] failing test

---
 .../samples/effect-order-7/A.svelte           |  9 ++++++++
 .../samples/effect-order-7/B.svelte           |  9 ++++++++
 .../samples/effect-order-7/Child.svelte       | 20 +++++++++++++++++
 .../samples/effect-order-7/_config.js         | 13 +++++++++++
 .../samples/effect-order-7/main.svelte        | 22 +++++++++++++++++++
 5 files changed, 73 insertions(+)
 create mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-7/A.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-7/B.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-7/Child.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-7/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-7/main.svelte

diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-7/A.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order-7/A.svelte
new file mode 100644
index 0000000000..54f4869d62
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-7/A.svelte
@@ -0,0 +1,9 @@
+<script>
+	import B from './B.svelte';
+
+	let { boolean, closed } = $props();
+</script>
+
+<span>{boolean}</span>
+
+<B {closed} />
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-7/B.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order-7/B.svelte
new file mode 100644
index 0000000000..2a2e634db1
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-7/B.svelte
@@ -0,0 +1,9 @@
+<script>
+	import { close } from './Child.svelte';
+
+	let { closed } = $props();
+
+	$effect.pre(() => {
+		if (closed) close();
+	});
+</script>
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-7/Child.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order-7/Child.svelte
new file mode 100644
index 0000000000..9606fd8602
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-7/Child.svelte
@@ -0,0 +1,20 @@
+<script module>
+	let object = $state();
+
+	export function open() {
+		object = { nested: { boolean: true } };
+	}
+
+	export function close() {
+		object = undefined;
+	}
+</script>
+
+<script>
+	let { children } = $props();
+</script>
+
+{#if object?.nested}
+	<!-- error occurs here, this is executed when the if should already make it falsy -->
+	{@render children(object.nested)}
+{/if}
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-7/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-order-7/_config.js
new file mode 100644
index 0000000000..8f9077e954
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-7/_config.js
@@ -0,0 +1,13 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target, logs }) {
+		const [open, close] = target.querySelectorAll('button');
+
+		flushSync(() => open.click());
+		flushSync(() => close.click());
+
+		assert.deepEqual(logs, [true]);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-7/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order-7/main.svelte
new file mode 100644
index 0000000000..c9c45c50cf
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-7/main.svelte
@@ -0,0 +1,22 @@
+<script>
+	import A from './A.svelte';
+	import Child, { open } from './Child.svelte';
+
+	let closed = $state(false);
+</script>
+
+<button onclick={open}>
+	open
+</button>
+
+<button onclick={() => closed = true}>
+	close
+</button>
+
+<hr>
+
+<Child>
+	{#snippet children(nested)}
+		<A {closed} boolean={nested.boolean} />
+	{/snippet}
+</Child>