v8/test/mjsunit/harmony/regress/regress-772649.js

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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --harmony-async-iteration
async function* gen([[notIterable]] = [null]) {}
assertThrows(() => gen(), TypeError);
assertThrows(() => gen(), TypeError);
%OptimizeFunctionOnNextCall(gen);
assertThrows(() => gen(), TypeError);