Stefan Monnier
Note that this is a safety measure for the submitter: If the code is, indeed, released to the public, it is (dual licesed) GPL, anyway, even if that might not have been the intent.
No. If the submitter did not explicitly release his code under the GPL, then it is not licensed under the GPL, even if is a derivative of GPL code. Instead, it is a breach of the GPL license and the submitter is exposing himself to a civil suit.
...I think for the majority of non-commercial developers (and even a lot of companies), the net result is the same. -- (c) this sig last receiving data processing entity. Inspect headers for copyright history. All rights reserved. Copying, hiring, renting, performance and/or quoting of this signature prohibited.