| // Copyright (C) 2020 Alexey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-object-initializer |
| description: Permitted duplicate `__proto__` property (shorthand) |
| info: | |
| Annex B defines an early error for duplicate PropertyName of `__proto__`, |
| but this does not apply to properties created from other productions. |
| |
| B.3.1 __proto__ Property Names in Object Initializers |
| |
| It is a Syntax Error if PropertyNameList of PropertyDefinitionList contains |
| any duplicate entries for "__proto__" and at least two of those entries |
| were obtained from productions of the form |
| PropertyDefinition : PropertyName : AssignmentExpression . |
| ---*/ |
| |
| var __proto__ = 2; |
| var obj = { |
| __proto__, |
| __proto__, |
| }; |
| |
| assert(obj.hasOwnProperty("__proto__")); |
| assert.sameValue(obj.__proto__, 2); |
