src/dstr-binding/ary-ptrn-elem-ary-elision-init.case

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: BindingElement with array binding pattern and initializer is used
template: default
info: |
    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    BindingElement : BindingPatternInitializer opt

    [...]
    2. If iteratorRecord.[[done]] is true, let v be undefined.
    3. If Initializer is present and v is undefined, then
       a. Let defaultValue be the result of evaluating Initializer.
       b. Let v be ? GetValue(defaultValue).
    4. Return the result of performing BindingInitialization of BindingPattern
       with v and environment as the arguments.
features: [generators]
---*/

//- setup
var first = 0;
var second = 0;
function* g() {
  first += 1;
  yield;
  second += 1;
};
//- elems
[[,] = g()]
//- vals
[]
//- body
assert.sameValue(first, 1);
assert.sameValue(second, 0);