text: // Copyright (C) 2016 the V8 project authors. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  /*---
  esid: sec-exports
  es6id: 15.2.3
  description: The default export may not be a LexicalDeclaration (let)
  flags: [module]
  negative:
    phase: early
    type: SyntaxError
  ---*/
  
  export default let x;
  