I find a bug. How can I commit it to cocos2d-x?

When I develop my game. I find a bug of cocos2d-x.
I don’t know how to tell cocos2d-x team this bug?
Who can tell me the method?
Or tell me a URL to learn.
Thanks!

You can submit bug here
http://cocos2d-x.org/projects/native/issues/new