src/third_party/v8/test/mjsunit/regress/regress-crbug-196583.js

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//
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// Flags: --allow-natives-syntax

var a = 1;
a.__proto__.f = 1;
a.__proto__.f = function() {
  return 1;
};

// Create some polymorphism.
function B() {}
B.prototype = {
  f: function() {
    return 2;
  }
};
var b = new B();
function C() {}
C.prototype = {
  g: 'foo',
  f: function() {
    return 3;
  }
};
var c = new C();

function crash(obj) {
  return obj.f();
};
%PrepareFunctionForOptimization(crash);
for (var i = 0; i < 2; i++) {
  crash(a);
  crash(b);
  crash(c);
}
%OptimizeFunctionOnNextCall(crash);
assertEquals(1, crash(a));