text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding/obj-ptrn-prop-obj.case
  // - src/dstr-binding/default/async-gen-func-expr.template
  /*---
  description: Object binding pattern with "nested" object binding pattern not using initializer (async generator function expression)
  esid: sec-asyncgenerator-definitions-evaluation
  features: [async-iteration]
  flags: [generated, async]
  info: |
      AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) {
          AsyncGeneratorBody }
  
          [...]
          3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
             AsyncGeneratorBody, scope, strict).
          [...]
  
  
      13.3.3.7 Runtime Semantics: KeyedBindingInitialization
  
      [...]
      3. If Initializer is present and v is undefined, then
         [...]
      4. Return the result of performing BindingInitialization for BindingPattern
         passing v and environment as arguments.
  ---*/
  
  
  var callCount = 0;
  var f;
  f = async function*({ w: { x, y, z } = { x: 4, y: 5, z: 6 } }) {
    assert.sameValue(x, undefined);
    assert.sameValue(y, undefined);
    assert.sameValue(z, 7);
  
    assert.throws(ReferenceError, function() {
      w;
    });
    callCount = callCount + 1;
  };
  
  f({ w: { x: undefined, z: 7 } }).next().then(() => {
      assert.sameValue(callCount, 1, 'invoked exactly once');
  }).then($DONE, $DONE);
  