third_party/v8/test/mjsunit/regress/regress-crbug-323942.js

// Copyright 2013 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --allow-natives-syntax

"use strict";

// Function is defined on the prototype chain.
var holder = {
  f: function() {
    return 42;
  }
};
var receiver = {};
receiver.__proto__ = {};
receiver.__proto__.__proto__ = holder;

// Inline two levels.
function h(o) {
  return o.f.apply(this, arguments);
}
function g(o) {
  return h(o);
}

// Collect type information for apply call.
;
%PrepareFunctionForOptimization(g);
assertEquals(42, g(receiver));
assertEquals(42, g(receiver));

// Sneakily remove the function from the prototype chain.
// The receiver map does not change.
receiver.__proto__.__proto__ = {};

// Lookup of o.f during graph creation fails.
%OptimizeFunctionOnNextCall(g);

assertThrows(function() {
  g(receiver);
});

// Put function back.
receiver.__proto__.__proto__ = holder;
assertEquals(42, g(receiver));