tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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privatefieldset-evaluation-order-2.js (976B)

      1 // Copyright (C) 2021 André Bargull. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: >
      6  Evaluation order when resolving private fields.
      7 esid: sec-runtime-semantics-keyeddestructuringassignmentevaluation
      8 info: |
      9  13.15.5.6 Runtime Semantics: KeyedDestructuringAssignmentEvaluation
     10    1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
     11      a. Let lref be the result of evaluating DestructuringAssignmentTarget.
     12      b. ReturnIfAbrupt(lref).
     13  2. Let v be ? GetV(value, propertyName).
     14  3. ...
     15 
     16 features: [class, class-fields-private]
     17 ---*/
     18 
     19 class C {
     20  #field;
     21 
     22  m() {
     23    var object = {
     24      get a() {
     25        throw new Test262Error();
     26      }
     27    };
     28 
     29    // The getter is executed before the check if the private field is present.
     30    ({a: this.#field} = object);
     31  }
     32 }
     33 
     34 assert.throws(Test262Error, function() {
     35  C.prototype.m.call({});
     36 });
     37 
     38 reportCompare(0, 0);