// Copyright 2015 Mike Pennisi. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-getidentifierreference es6id: 8.1.2.1 description: > Behavior when accessing property of `Symbol.unscopables` property throws an error info: | [...] 2. Let envRec be lex's EnvironmentRecord. 3. Let exists be ? envRec.HasBinding(name). 8.1.1.2.1 HasBinding [...] 5. If the withEnvironment flag of envRec is false, return true. 6. Let unscopables be ? Get(bindings, @@unscopables). 7. If Type(unscopables) is Object, then a. Let blocked be ToBoolean(? Get(unscopables, N)). b. If blocked is true, return false. 13.11.7 (The `with` Statement) Runtime Semantics: Evaluation [...] 5. Set the withEnvironment flag of newEnv’s EnvironmentRecord to true. [...] flags: [noStrict] features: [Symbol.unscopables] ---*/ var env = { x: 86 }; env[Symbol.unscopables] = {}; Object.defineProperty(env[Symbol.unscopables], 'x', { get: function() { throw new Test262Error(); } }); with (env) { assert.throws(Test262Error, function() { x; }); } reportCompare(0, 0);