Changes to closest (#6507) breaks $(event.target).closest(...) in event handlers

Any event handlers that follow this pattern no longer work:
$('.container').bind('click', function(event) {
$(event.target).closest('.clickable').doSomething();
});
as the context is set to event.target
Demo:
http://jsbin.com/ataxe
Ticket:
http://dev.jquery.com/ticket/4986