fix cycle check for exported functions

src/compile/Component.ts

@@ -1002,6 +1002,8 @@ export default class Component {
 
 								if (walking.has(other_declaration)) {
 									hoistable = false;
+								} else if (other_declaration.type === 'ExportNamedDeclaration' && walking.has(other_declaration.declaration)) {
+									hoistable = false;
 								} else if (!is_hoistable(other_declaration)) {
 									hoistable = false;
                 }