tor-browser

The Tor Browser
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meth-dflt-ary-ptrn-rest-id-iter-val-err.js (2292B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-id-iter-val-err.case
      3 // - src/dstr-binding/error/meth-dflt.template
      4 /*---
      5 description: Error forwarding when IteratorValue returns an abrupt completion (method (default parameter))
      6 esid: sec-runtime-semantics-definemethod
      7 features: [Symbol.iterator, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     11 
     12    [...]
     13    6. Let closure be FunctionCreate(kind, StrictFormalParameters,
     14       FunctionBody, scope, strict). If functionPrototype was passed as a
     15       parameter then pass its value as the functionPrototype optional argument
     16       of FunctionCreate.
     17    [...]
     18 
     19    9.2.1 [[Call]] ( thisArgument, argumentsList)
     20 
     21    [...]
     22    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     23    [...]
     24 
     25    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     26 
     27    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     28    [...]
     29 
     30    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     31 
     32    [...]
     33    23. Let iteratorRecord be Record {[[iterator]]:
     34        CreateListIterator(argumentsList), [[done]]: false}.
     35    24. If hasDuplicates is true, then
     36        [...]
     37    25. Else,
     38        b. Let formalStatus be IteratorBindingInitialization for formals with
     39           iteratorRecord and env as arguments.
     40    [...]
     41 
     42    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     43    BindingRestElement : ... BindingIdentifier
     44    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     45       environment).
     46    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     47       [...]
     48       c. Let nextValue be IteratorValue(next).
     49       d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to
     50          true.
     51       e. ReturnIfAbrupt(nextValue).
     52 
     53 ---*/
     54 var poisonedValue = Object.defineProperty({}, 'value', {
     55  get: function() {
     56    throw new Test262Error();
     57  }
     58 });
     59 var iter = {};
     60 iter[Symbol.iterator] = function() {
     61  return {
     62    next: function() {
     63      return poisonedValue;
     64    }
     65  };
     66 };
     67 
     68 var obj = {
     69  method([...x] = iter) {}
     70 };
     71 
     72 assert.throws(Test262Error, function() {
     73  obj.method();
     74 });
     75 
     76 reportCompare(0, 0);