add failing test

packages/svelte/src/compiler/phases/3-transform/client/visitors/SvelteBoundary.js

@@ -69,13 +69,13 @@ export function SvelteBoundary(node, context) {
 			if (node.fragment.metadata.has_await) {
 				// we have to make sure the `$.suspend` goes before everything else
 				snippet_fn.body.body.splice(
-					dev ? 2 : 1,
+					dev ? 3 : 2,
 					0,
 					...const_tags.filter((node) => node.type === 'VariableDeclaration')
 				);
 			} else {
 				snippet_fn.body.body.splice(
-					dev ? 1 : 0,
+					dev ? 2 : 1,
 					0,
 					...const_tags.filter((node) => node.type === 'VariableDeclaration')
 				);

packages/svelte/tests/runtime-runes/samples/async-const/_config.js

@@ -7,6 +7,6 @@ export default test({
 	async test({ assert, target }) {
 		await tick();
 
-		assert.htmlEqual(target.innerHTML, `<h1>Hello, world!</h1>`);
+		assert.htmlEqual(target.innerHTML, `<h1>Hello, world!</h1> 5 01234`);
 	}
 });

packages/svelte/tests/runtime-runes/samples/async-const/main.svelte

@@ -3,6 +3,7 @@
 </script>
 
 <svelte:boundary>
+	{@const number = await Promise.resolve(5)}
 	{#snippet pending()}
 		<h1>Loading...</h1>
 	{/snippet}
@@ -10,6 +11,13 @@
 	{#snippet greet()}
 		{@const greeting = await `Hello, ${name}!`}
 		<h1>{greeting}</h1>
+		{number}
+		{#if number > 4}
+			{#each { length: number }, index}
+				{@const i = await index}
+				{i}
+			{/each}
+		{/if}
 	{/snippet}
 
 	{@render greet()}