fix

Author: Rich-Harris

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

@@ -61,12 +61,14 @@ export function build_template_chunk(values, visit, state) {
 									'??',
 									/** @type {Expression} */ (visit(node.expression, state)),
 									b.literal('')
-								)
+								),
+								is_async
 							)
 						)
 					)
 				);
-				expressions.push(b.call('$.get', id));
+
+				expressions.push(is_async ? b.await(b.call('$.get', id)) : b.call('$.get', id));
 			} else if (values.length === 1) {
 				// If we have a single expression, then pass that in directly to possibly avoid doing
 				// extra work in the template_effect (instead we do the work in set_text).

packages/svelte/src/compiler/utils/builders.js

@@ -426,12 +426,15 @@ export function thunk(expression, async = false) {
 
 /**
  * Replace "(arg) => func(arg)" to "func"
- * @param {ESTree.Expression} expression
+ * @param {ESTree.ArrowFunctionExpression} expression
  * @returns {ESTree.Expression}
  */
 export function unthunk(expression) {
+	if (expression.async && expression.body.type === 'AwaitExpression') {
+		return unthunk(arrow(expression.params, expression.body.argument));
+	}
+
 	if (
-		expression.type === 'ArrowFunctionExpression' &&
 		expression.async === false &&
 		expression.body.type === 'CallExpression' &&
 		expression.body.callee.type === 'Identifier' &&