module: report unfinished TLA in ambiguous modules

PR-URL: #54980 Backport-PR-URL: #56927 Fixes: #54931 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Refs: #52697

Author: aduh95

lib/internal/modules/cjs/loader.js

@@ -1336,7 +1336,7 @@ function loadESMFromCJS(mod, filename) {
  if (isMain) {
  require('internal/modules/run_main').runEntryPointWithESMLoader((cascadedLoader) => {
  const mainURL = pathToFileURL(filename).href;
- cascadedLoader.import(mainURL, undefined, { __proto__: null }, true);
+ return cascadedLoader.import(mainURL, undefined, { __proto__: null }, true);
  });
  // ESM won't be accessible via process.mainModule.
  setOwnProperty(process, 'mainModule', undefined);

test/es-module/test-esm-detect-ambiguous.mjs

@@ -252,6 +252,18 @@ describe('Module syntax detection', { concurrency: !process.env.TEST_PARALLEL },
  strictEqual(signal, null);
  });
 
+ it('reports unfinished top-level `await`', async () => {
+ const { stdout, stderr, code, signal } = await spawnPromisified(process.execPath, [
+ '--no-warnings',
+ fixtures.path('es-modules/tla/unresolved.js'),
+ ]);
+
+ strictEqual(stderr, '');
+ strictEqual(stdout, '');
+ strictEqual(code, 13);
+ strictEqual(signal, null);
+ });
+
  it('permits top-level `await` above import/export syntax', async () => {
  const { stdout, stderr, code, signal } = await spawnPromisified(process.execPath, [
  '--eval',

test/fixtures/es-modules/tla/unresolved.js

@@ -0,0 +1 @@
+await new Promise(() => {});