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// Copyright 2018 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
function Foo() {}
function f() {
return [42].map(_ => 88);
}
let y;
y = f();
assertFalse(y instanceof Foo);
assertInstanceof(y, Array);
y = f();
assertFalse(y instanceof Foo);
assertInstanceof(y, Array);
%OptimizeFunctionOnNextCall(f);
y = f();
assertFalse(y instanceof Foo);
assertInstanceof(y, Array);
assertTrue(Reflect.defineProperty(Array, Symbol.species, {value: Foo}));
y = f();
assertInstanceof(y, Foo);
assertFalse(y instanceof Array);
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