// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
// - src/dstr-binding/error/async-gen-func-decl-dflt.template
/*---
description: Error forwarding when IteratorStep returns an abrupt completion (async generator function declaration (default parameter))
esid: sec-asyncgenerator-definitions-instantiatefunctionobject
features: [Symbol.iterator, async-iteration]
flags: [generated]
info: |
    AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
        ( FormalParameters ) { AsyncGeneratorBody }

        [...]
        3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
            scope, strict).
        [...]

    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    4. If iteratorRecord.[[done]] is false, then
       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
       c. ReturnIfAbrupt(next).

---*/
var g = {};
g[Symbol.iterator] = function() {
  return {
    next: function() {
      throw new Test262Error();
    }
  };
};


async function* f([x] = g) {
  
};

assert.throws(Test262Error, function() {
  f();
});