fix

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

@@ -143,6 +143,7 @@ export function Program(node, context) {
 		const transformed = /** @type {Program['body'][number]} */ (context.visit(node.body[i]));
 		body.push(transformed);
 	}
+	if (context.state.parallelized_chunks) {
 		let offset = 0;
 		for (const chunk of context.state.parallelized_chunks) {
 			if (chunk.declarators.length === 1) {
@@ -165,6 +166,7 @@ export function Program(node, context) {
 			}
 			offset++;
 		}
+	}
 	return {
 		...node,
 		body