lib: fix checking syntax of esm module

Fixes: #41189

PR-URL: #41198
Refs: #37468
Reviewed-By: Derek Lewis <DerekNonGeneric@inf.is>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: Ayase-252

lib/internal/main/check_syntax.js

@@ -54,7 +54,7 @@ function checkSyntax(source, filename) {
     const { defaultResolve } = require('internal/modules/esm/resolve');
     const { defaultGetFormat } = require('internal/modules/esm/get_format');
     const { url } = defaultResolve(pathToFileURL(filename).toString());
-    const { format } = defaultGetFormat(url);
+    const format = defaultGetFormat(url);
     isModule = format === 'module';
   }
   if (isModule) {

test/fixtures/syntax/good_syntax.mjs

@@ -0,0 +1,3 @@
+export function testFunction(req, res) {
+  return 'PASS';
+}

test/sequential/test-cli-syntax-good.js

@@ -17,6 +17,7 @@ const syntaxArgs = [
 [
   'syntax/good_syntax.js',
   'syntax/good_syntax',
+  'syntax/good_syntax.mjs',
   'syntax/good_syntax_shebang.js',
   'syntax/good_syntax_shebang',
   'syntax/illegal_if_not_wrapped.js',