// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
// - src/dstr-binding/error/gen-func-decl-dflt.template
/*---
description: Error forwarding when IteratorStep returns an abrupt completion (generator function declaration (default parameter))
esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
es6id: 14.4.12
features: [Symbol.iterator, generators, destructuring-binding, default-parameters]
flags: [generated]
info: |
    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }

        [...]
        2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
           GeneratorBody, scope, strict).
        [...]

    9.2.1 [[Call]] ( thisArgument, argumentsList)

    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]

    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )

    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]

    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)

    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]

    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();
    }
  };
};

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

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