From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 11 Jul 2014 16:01:40 GMT
Subject: Re: [Bug] data loss with cyclic alternates
Message-ID: <xmqqy4vz51gb.fsf@gitster.dls.corp.google.com>
In-Reply-To: <53BFB055.206@gmail.com>

Ephrim Khong <dr.khong@gmail.com> writes:

> git seems to have issues with alternates when cycles are present (repo
> A has B/objects as alternates, B has A/objects as alternates).

Yeah, don't do that.  A thinks "eh, the other guy must have it" and
B thinks the same.  In general, do not prune or gc a repository
other repositories borrow from, even if there is no cycle, because
the borrowee does not know anythning about objects that it itself no
longer needs but are still needed by its borrowers.