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From:   Junio C Hamano <gitster@pobox.com>
To:     Eric Rannaud <e@nanocritical.com>
Cc:     git@vger.kernel.org, Jeremy SERROR <jeremy.serror@gmail.com>,
        "Shawn O . Pearce" <spearce@spearce.org>
Subject: Re: [PATCH] fast-import: checkpoint: dump branches/tags/marks even if object_count==0
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Date:   Thu, 28 Sep 2017 15:02:39 +0900
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        (Eric Rannaud's message of "Wed, 27 Sep 2017 21:56:14 -0700")
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Eric Rannaud <e@nanocritical.com> writes:

> Doesn't fast-import get a copy of 8 (open for both reading and
> writing), as a child process, and exec 8>&- only closes the copy of
> the file descriptor in the parent shell, so the named pipe remains
> open for writing somewhere (in the fast-import process itself, in
> fact), therefore fast-import will not find EOF on its stdin?

AHHHHhhhh.  If that was done intentionally, well, I really have to
marvel at the cleverness of the solution!  It makes sense now to me.