JSTests/stress/regress-179634.js

function foo() {
    return {
        get: function () { },
        set: Object,
    };
}

var exception;
try {
    Object.defineProperties({}, {
        2: foo(),
        0: foo(),
        1: foo(),
        ' ': foo(),
        9: foo(),
        B: 'B',
    });
} catch (e) {
    exception = e;
}

if (exception != "TypeError: Property description must be an object.")
    throw "FAILED";