fix: handle falsy prop aliases correctly

fixes #10854

Author: dummdidumm

.changeset/strong-apricots-destroy.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: handle falsy prop aliases correctly

packages/svelte/src/compiler/phases/2-analyze/index.js

@@ -967,7 +967,7 @@ const runes_scope_tweaker = {
 				const alias =
 					property.key.type === 'Identifier'
 						? property.key.name
-						: /** @type {string} */ (/** @type {import('estree').Literal} */ (property.key).value);
+						: String(/** @type {import('estree').Literal} */ (property.key).value);
 				let initial = property.value.type === 'AssignmentPattern' ? property.value.right : null;
 
 				const binding = /** @type {import('#compiler').Binding} */ (state.scope.get(name));

packages/svelte/tests/runtime-runes/samples/props-alias-weird/Child.svelte

@@ -0,0 +1,5 @@
+<script>
+	let { 0: zero, 'ysc%%gibberish': one } = $props();
+</script>
+
+{zero} {one}

packages/svelte/tests/runtime-runes/samples/props-alias-weird/_config.js

@@ -0,0 +1,5 @@
+import { test } from '../../test';
+
+export default test({
+	html: `0 1`
+});

packages/svelte/tests/runtime-runes/samples/props-alias-weird/main.svelte

@@ -0,0 +1,5 @@
+<script>
+    import Child from './Child.svelte';
+</script>
+
+<Child 0={0} ysc%%gibberish={1} />