test/mjsunit/regress/regress-crbug-72736.js

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// See http://crbug.com/72736

// This tests that Object.defineProperty actually allows to change the value of
// a non-writable property if configurable is true.

var obj = {};
Object.defineProperty(obj, 'foo', { value: 10, configurable: true });
assertEquals(obj.foo, 10);
Object.defineProperty(obj, 'foo', { value: 20, configurable: true });
assertEquals(obj.foo, 20);