add failing test

packages/svelte/tests/runtime-legacy/samples/component-binding-each-reassigned/Child.svelte

@@ -0,0 +1,7 @@
+<script>
+	export let value;
+
+	value += 1;
+</script>
+
+<p>{value}</p>

packages/svelte/tests/runtime-legacy/samples/component-binding-each-reassigned/_config.js

@@ -0,0 +1,19 @@
+import { test } from '../../test';
+
+export default test({
+	html: `
+		<p>2, 3, 4</p>
+		<p>2</p>
+		<p>3</p>
+		<p>4</p>
+		<p>2, 3, 4</p>
+	`,
+
+	ssrHtml: `
+		<p>1, 2, 3</p>
+		<p>2</p>
+		<p>3</p>
+		<p>4</p>
+		<p>1, 2, 3</p>
+	`
+});

packages/svelte/tests/runtime-legacy/samples/component-binding-each-reassigned/main.svelte

@@ -0,0 +1,13 @@
+<script>
+	import Child from './Child.svelte';
+
+	let numbers = [1, 2, 3];
+</script>
+
+<p>{numbers.join(', ')}</p>
+
+{#each numbers as n}
+	<Child bind:value={n} />
+{/each}
+
+<p>{numbers.join(', ')}</p>