From: Samuel Bronson <naesten@gmail.com>
Date: Wed, 11 Dec 2013 04:37:14 GMT
Subject: [BUG] "echo HEAD | git cat-file --batch=''" fails catastrophically
Message-ID: <CAJYzjmdHdLZaBijahepOQDJtDd_TdojT4ivNxGrcerRfEuHQEg@mail.gmail.com>

Observe:

% echo HEAD | git cat-file --batch=

fatal: object fde075cb72fc0773d8e8ca93d55a35d77bb6688b changed type!?

Without the =, it works fine; with a string that has both
"%(objecttype)" and "%(objectsize)", it's fine; but when you don't
include both, it complains about one of the values that you did not
mention having changed.

jrnieder fingered v1.8.4-rc0~7^2~15 as the (likely?) culprit here.