tor-browser

The Tor Browser
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ary-ptrn-rest-id-iter-val-err.js (2157B)

      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/func-decl.template
      4 /*---
      5 description: Error forwarding when IteratorValue returns an abrupt completion (function declaration)
      6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [Symbol.iterator, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    FunctionDeclaration :
     11        function BindingIdentifier ( FormalParameters ) { FunctionBody }
     12 
     13        [...]
     14        3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
     15           scope, strict).
     16        [...]
     17 
     18    9.2.1 [[Call]] ( thisArgument, argumentsList)
     19 
     20    [...]
     21    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     22    [...]
     23 
     24    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     25 
     26    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     27    [...]
     28 
     29    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     30 
     31    [...]
     32    23. Let iteratorRecord be Record {[[iterator]]:
     33        CreateListIterator(argumentsList), [[done]]: false}.
     34    24. If hasDuplicates is true, then
     35        [...]
     36    25. Else,
     37        b. Let formalStatus be IteratorBindingInitialization for formals with
     38           iteratorRecord and env as arguments.
     39    [...]
     40 
     41    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     42    BindingRestElement : ... BindingIdentifier
     43    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     44       environment).
     45    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     46       [...]
     47       c. Let nextValue be IteratorValue(next).
     48       d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to
     49          true.
     50       e. ReturnIfAbrupt(nextValue).
     51 
     52 ---*/
     53 var poisonedValue = Object.defineProperty({}, 'value', {
     54  get: function() {
     55    throw new Test262Error();
     56  }
     57 });
     58 var iter = {};
     59 iter[Symbol.iterator] = function() {
     60  return {
     61    next: function() {
     62      return poisonedValue;
     63    }
     64  };
     65 };
     66 
     67 function f([...x]) {}
     68 
     69 assert.throws(Test262Error, function() {
     70  f(iter);
     71 });
     72 
     73 reportCompare(0, 0);