v8/test/mjsunit/regress/regress-crbug-667689.js

// Copyright 2016 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() {}
foo.__defineGetter__(undefined, function() {});

function bar() {}
function baz(x) {
  return x instanceof bar;
};
%PrepareFunctionForOptimization(baz);
;
%OptimizeFunctionOnNextCall(baz);
baz();
Object.setPrototypeOf(bar, null);
bar[Symbol.hasInstance] = function() {
  return true;
};
assertTrue(baz());