text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding-for-await/obj-ptrn-id-init-skipped.case
  // - src/dstr-binding-for-await/default/for-await-of-async-gen-let-async.template
  /*---
  description: Destructuring initializer is not evaluated when value is not `undefined` (for-await-of statement)
  esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
  features: [destructuring-binding, async-iteration]
  flags: [generated, async]
  info: |
      IterationStatement :
          for await ( ForDeclaration of AssignmentExpression ) Statement
  
      [...]
      2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
          lexicalBinding, labelSet, async).
  
      13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
  
      [...]
      4. Let destructuring be IsDestructuring of lhs.
      [...]
      6. Repeat
         [...]
         j. If destructuring is false, then
            [...]
         k. Else
            i. If lhsKind is assignment, then
               [...]
            ii. Else if lhsKind is varBinding, then
                [...]
            iii. Else,
                 1. Assert: lhsKind is lexicalBinding.
                 2. Assert: lhs is a ForDeclaration.
                 3. Let status be the result of performing BindingInitialization
                    for lhs passing nextValue and iterationEnv as arguments.
            [...]
  
      13.3.3.7 Runtime Semantics: KeyedBindingInitialization
  
      SingleNameBinding : BindingIdentifier Initializer_opt
  
      [...]
      6. If Initializer is present and v is undefined, then
         [...]
      [...]
  ---*/
  var initCount = 0;
  function counter() {
    initCount += 1;
  }
  
  var iterCount = 0;
  var asyncIter = (async function*() {
    yield* [{ w: null, x: 0, y: false, z: '' }];
  })();
  
  async function *fn() {
    for await (let { w = counter(), x = counter(), y = counter(), z = counter() } of asyncIter) {
      assert.sameValue(w, null);
      assert.sameValue(x, 0);
      assert.sameValue(y, false);
      assert.sameValue(z, '');
      assert.sameValue(initCount, 0);
  
      iterCount += 1;
    }
  }
  
  fn().next()
    .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
    .then($DONE, $DONE);
  