v8/test/mjsunit/regress/regress-11519.js

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// Copyright 2021 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 --gc-interval=500 --stress-compaction
function bar(a) {
return Object.defineProperty(a, 'x', {get() { return 1; }});
}
function foo() {
return {};
}
%NeverOptimizeFunction(bar);
%PrepareFunctionForOptimization(foo);
const o = foo(); // Keep a reference so the GC doesn't kill the map.
%SimulateNewspaceFull();
bar(o);
const a = bar(foo());
%SimulateNewspaceFull();
%OptimizeFunctionOnNextCall(foo);
const b = bar(foo());
assertTrue(%HaveSameMap(a, b));