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// |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
// Copyright (C) 2023 Ron Buckton. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-declarative-environment-records-setmutablebinding-n-v-s
description: >
await using: invalid assignment in next expression. Since an `await using` declaration introduces an immutable
binding, any attempt to change it results in a TypeError.
flags: [async]
includes: [asyncHelpers.js]
features: [explicit-resource-management]
---*/
asyncTest(async function () {
await assert.throwsAsync(TypeError, async function() {
for (await using i = null; i === null; i = { [Symbol.dispose]() { } }) {}
});
});