JSTests/test262/test/language/statements/let/global-closure-set-before-initialization.js

// Copyright (C) 2011 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 13.1
description: >
    let: global closure [[Set]] before initialization.
    (TDZ, Temporal Dead Zone)
---*/
function f() { x = 1; }

assert.throws(ReferenceError, function() {
  f();
});

let x;