use fragment as async hoist boundary

packages/svelte/src/compiler/phases/2-analyze/visitors/AwaitExpression.js

@@ -2,6 +2,7 @@
 /** @import { Context } from '../types' */
 import * as e from '../../../errors.js';
 import * as b from '#compiler/builders';
+import { filename } from '../../../state.js';
 
 /**
  * @param {AwaitExpression} node
@@ -17,14 +18,12 @@ export function AwaitExpression(node, context) {
 			context.state.fragment.metadata.has_await = true;
 		}
 
-		if (context.state.async_hoist_boundary) {
+		if (context.state.fragment) {
-			const len = context.state.async_hoist_boundary.metadata.hoisted_promises.promises.push(
+			const len = context.state.fragment.metadata.hoisted_promises.promises.push(node.argument);
-				node.argument
-			);
 			context.state.analysis.hoisted_promises.set(
 				node.argument,
 				b.member(
-					b.id(context.state.async_hoist_boundary.metadata.hoisted_promises.name),
+					b.id(context.state.fragment.metadata.hoisted_promises.name),
 					b.literal(len - 1),
 					true
 				)

packages/svelte/src/compiler/phases/3-transform/server/visitors/RegularElement.js

@@ -192,6 +192,15 @@ export function RegularElement(node, context) {
 			)
 		);
 	} else {
+		if (node.fragment.metadata.hoisted_promises.promises.length > 0) {
+			state.template.push(
+				b.const(
+					node.fragment.metadata.hoisted_promises.name,
+					b.array(node.fragment.metadata.hoisted_promises.promises)
+				)
+			);
+		}
+
 		process_children(trimmed, { ...context, state });
 	}
 

packages/svelte/src/compiler/phases/3-transform/server/visitors/TitleElement.js

@@ -8,6 +8,15 @@ import { process_children, build_template, call_child_payload } from './shared/u
  * @param {ComponentContext} context
  */
 export function TitleElement(node, context) {
+	if (node.fragment.metadata.hoisted_promises.promises.length > 0) {
+		context.state.init.push(
+			b.const(
+				node.fragment.metadata.hoisted_promises.name,
+				b.array(node.fragment.metadata.hoisted_promises.promises)
+			)
+		);
+	}
+
 	// title is guaranteed to contain only text/expression tag children
 	const template = [b.literal('<title>')];
 	process_children(node.fragment.nodes, { ...context, state: { ...context.state, template } });