From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Riesen <raa.lkml@gmail.com>
Subject: Re: Serious bug with pretty format strings & empty bodies?
Date: Wed, 19 Dec 2007 19:44:57 +0100
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To: Jonathan del Strother <maillist@steelskies.com>
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Jonathan del Strother, Wed, Dec 19, 2007 15:32:20 +0100:
> I'm struggling to come up with a minimal test case that confirms this,
> but I seem to be hitting a bug in the pretty string formatter when
> trying to print bodies of commits that don't have bodies.

I tried

    $ git init
    $ git rev-list --pretty=format:"%s%n%b" \
	$(echo -n "Test" |git commit-tree $(git write-tree))

but it works. It is possible that the commit in question is created
with an older commit-tree code. Could you try

    git cat-file 18d2480ab689b483ef1ebbdb3f7420904049ba0b

(or any other problematic commit) and post its output here?
Or is the repo publised somewhere?