non-Strict mode Passing
Features:
- ∅
// Copyright (C) 2017 Caio Lima. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- description: Mapped arguments property descriptor change to non-writable and non-configurable info: | Mapping stop working when property is set to non-writable. Here we change the descriptor using [[DefineOwnProperty]] to {writable: false} and then change property descriptor to {configurable: false} in sequence. The property descriptor need to be the one set before the property be configured as {writable: false}. flags: [noStrict] esid: sec-arguments-exotic-objects-defineownproperty-p-desc includes: [propertyHelper.js] ---*/ function fn(a) { Object.defineProperty(arguments, "0", {writable: false}); Object.defineProperty(arguments, "0", {configurable: false}); verifyProperty(arguments, "0", { value: 1, writable: false, enumerable: true, configurable: false, }); // Postcondition: Arguments mapping is removed. Descriptors need to be the same // as above. a = 2; verifyProperty(arguments, "0", { value: 1, writable: false, enumerable: true, configurable: false, }); } fn(1);