v8/test/webkit/flatten-dictionary-structure-from-which-all-properties-were-deleted.js

// Copyright 2013 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
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description(
"Tests that deleting all properties from an object and then flattening it doesn't cause inconsistencies."
);

var o = {};

for (var i = 0; i < 1000; ++i)
    o["a" + i] = i;

for (var i = 0; i < 1000; ++i)
    delete o["a" + i];

var p = {};
p.__proto__ = o;

var q = {f:42};
o.__proto__ = q;

for (var i = 0; i < 100; ++i)
    shouldBe("p.f", "42");