test/mjsunit/regress/regress-3006390.js

// Copyright 2010 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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function X() { }
X.prototype.valueOf = function () { return 7; }

function f(x, y) { return x % y; }

assertEquals(1, f(8, new X()));