JSTests/test262/test/language/statements/for/dstr/var-ary-ptrn-rest-id-iter-step-err.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
// - src/dstr-binding/error/for-var.template
/*---
description: Error forwarding when IteratorStep returns an abrupt completion (for statement)
esid: sec-for-statement-runtime-semantics-labelledevaluation
features: [generators, destructuring-binding]
flags: [generated]
info: |
    IterationStatement :
        for ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement

    1. Let varDcl be the result of evaluating VariableDeclarationList.
    [...]

    13.3.2.4 Runtime Semantics: Evaluation

    VariableDeclarationList : VariableDeclarationList , VariableDeclaration

    1. Let next be the result of evaluating VariableDeclarationList.
    2. ReturnIfAbrupt(next).
    3. Return the result of evaluating VariableDeclaration.

    VariableDeclaration : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let rval be GetValue(rhs).
    3. ReturnIfAbrupt(rval).
    4. Return the result of performing BindingInitialization for BindingPattern
       passing rval and undefined as arguments.

    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
    BindingRestElement : ... BindingIdentifier
    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
       environment).
    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
       a. If iteratorRecord.[[done]] is false,
          i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
          ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
              true.
          iii. ReturnIfAbrupt(next).

---*/
var first = 0;
var second = 0;
var iter = function*() {
  first += 1;
  throw new Test262Error();
  second += 1;
}();

assert.throws(Test262Error, function() {
  for (var [...x] = iter; iterCount < 1; ) {
    return;
  }
});

iter.next();
assert.sameValue(first, 1);
assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');