Re: [RFC PATCH 6/6] hex: allow only lowercase object IDs in breaking changes mode

[Junio C Hamano <gitster@pobox.com>]

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> Postel's Law was a great idea on the early Internet, but it is
> unfortunately no longer a good idea.  The problem is that being liberal
> in what you accept these days usually has security implications.

I am afraid that is debatable, though.

I would grant you that you can increase the attack surface by being
carelessly liberal.  Recall my example of allowing mixed-case names
for loose object files and storing them verbatim on a case-sensitive
filesystem without normalizing the names; that is an example of
being carelessly liberal.

But is it a good excuse to give up being careful, declare it is
impossible to be careful enough, and punt?

Will queue, but I invite others to chime in.  My practical side says
we should just take the series as it is much less work for us to
declare that any incompatibility fallout is the problem of other
people who have reimplementations of Git, but my more principled
side feels dirty, just for saying this ;-).

Thanks.