tor-browser

The Tor Browser
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spread-err-mult-err-itr-value.js (1552B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/spread/mult-err-itr-value.case
      3 // - src/spread/error/member-expr.template
      4 /*---
      5 description: Spread operator following other arguments when IteratorValue fails (`new` operator)
      6 esid: sec-new-operator-runtime-semantics-evaluation
      7 features: [Symbol.iterator]
      8 flags: [generated]
      9 info: |
     10    MemberExpression : new MemberExpression Arguments
     11 
     12    1. Return EvaluateNew(MemberExpression, Arguments).
     13 
     14    12.3.3.1.1 Runtime Semantics: EvaluateNew
     15 
     16    6. If arguments is empty, let argList be an empty List.
     17    7. Else,
     18       a. Let argList be ArgumentListEvaluation of arguments.
     19       [...]
     20 
     21    12.3.6.1 Runtime Semantics: ArgumentListEvaluation
     22 
     23    ArgumentList : ArgumentList , ... AssignmentExpression
     24 
     25    1. Let precedingArgs be the result of evaluating ArgumentList.
     26    2. Let spreadRef be the result of evaluating AssignmentExpression.
     27    3. Let iterator be GetIterator(GetValue(spreadRef) ).
     28    4. ReturnIfAbrupt(iterator).
     29 
     30    7.4.4 IteratorValue ( iterResult )
     31 
     32    1. Assert: Type(iterResult) is Object.
     33    2. Return Get(iterResult, "value").
     34 
     35    7.3.1 Get (O, P)
     36 
     37    [...]
     38    3. Return O.[[Get]](P, O).
     39 ---*/
     40 var iter = {};
     41 var poisonedValue = Object.defineProperty({}, 'value', {
     42  get: function() {
     43    throw new Test262Error();
     44  }
     45 });
     46 iter[Symbol.iterator] = function() {
     47  return {
     48    next: function() {
     49      return poisonedValue;
     50    }
     51  };
     52 };
     53 
     54 assert.throws(Test262Error, function() {
     55  new function() {}(0, ...iter);
     56 });
     57 
     58 reportCompare(0, 0);