tor-browser

The Tor Browser
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await-using-invalid-assignment-statement-body-for-of.js (939B)

      1 // |reftest| shell-option(--enable-explicit-resource-management) skip-if(!(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('explicit-resource-management'))||!xulRuntime.shell) async -- explicit-resource-management is not enabled unconditionally, requires shell-options
      2 // Copyright (C) 2023 Ron Buckton. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 
      5 /*---
      6 esid: sec-declarative-environment-records-setmutablebinding-n-v-s
      7 description: >
      8    await using: invalid assignment in Statement body. Since an `await using` declaration introduces an immutable
      9    binding, any attempt to change it results in a TypeError.
     10 flags: [async]
     11 includes: [asyncHelpers.js]
     12 features: [explicit-resource-management]
     13 ---*/
     14 
     15 asyncTest(async function () {
     16  await assert.throwsAsync(TypeError, async function () {
     17    for (await using x of [null]) { x = { [Symbol.dispose]() { } }; }
     18  });
     19 });