non-Strict mode Failing
Expected no error, got SyntaxError: invalid statement encountered.
Features:
- Symbol.unscopables
Expected no error, got SyntaxError: invalid statement encountered.
// 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: >
`Symbol.unscopables` is not referenced when environment record does not have
requested property
info: |
[...]
2. Let envRec be lex's EnvironmentRecord.
3. Let exists be ? envRec.HasBinding(name).
8.1.1.2.1 HasBinding
1. Let envRec be the object Environment Record for which the method was
invoked.
2. Let bindings be the binding object for envRec.
3. Let foundBinding be ? HasProperty(bindings, N).
4. If foundBinding is false, 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 x = 0;
var env = {};
var callCount = 0;
Object.defineProperty(env, Symbol.unscopables, {
get: function() {
callCount += 1;
}
});
with (env) {
x;
}
assert.sameValue(callCount, 0);