class base { constructor() { } }

class inst extends base { constructor() { super(); } }
Object.setPrototypeOf(inst, Math.sin);
assertThrowsInstanceOf(() => new inst(), TypeError);

class defaultInst extends base { }
Object.setPrototypeOf(inst, Math.sin);
assertThrowsInstanceOf(() => new inst(), TypeError);

if (typeof reportCompare === 'function')
    reportCompare(0,0,"OK");