mirror of https://github.com/tc39/test262.git
47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
// Copyright 2015 Mike Pennisi. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-getidentifierreference
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es6id: 8.1.2.1
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description: >
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Behavior when accessing property of `Symbol.unscopables` property throws an
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error
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info: |
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[...]
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2. Let envRec be lex's EnvironmentRecord.
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3. Let exists be ? envRec.HasBinding(name).
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8.1.1.2.1 HasBinding
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[...]
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5. If the withEnvironment flag of envRec is false, return true.
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6. Let unscopables be ? Get(bindings, @@unscopables).
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7. If Type(unscopables) is Object, then
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a. Let blocked be ToBoolean(? Get(unscopables, N)).
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b. If blocked is true, return false.
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13.11.7 (The `with` Statement) Runtime Semantics: Evaluation
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[...]
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5. Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
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[...]
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flags: [noStrict]
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features: [Symbol.unscopables]
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---*/
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var env = { x: 86 };
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env[Symbol.unscopables] = {};
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Object.defineProperty(env[Symbol.unscopables], 'x', {
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get: function() {
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throw new Test262Error();
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}
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});
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with (env) {
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assert.throws(Test262Error, function() {
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x;
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});
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}
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