From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Keeping <john@keeping.me.uk>
Subject: Re: [PUB]corrupt repos does not return error with `git fsck`
Date: Wed, 20 May 2015 19:19:44 +0100
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Cc: Johannes Schindelin <johannes.schindelin@gmx.de>,
	Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>,
	Faheem Mitha <faheem@faheem.info>,
	"git@vger.kernel.org" <git@vger.kernel.org>
To: Stefan Beller <sbeller@google.com>
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On Wed, May 20, 2015 at 11:02:14AM -0700, Stefan Beller wrote:
> $ git clone https://github.com/fmitha/SICL
> cd SICL
> $ git show 280c12ab49223c64c6f914944287a7d049cf4dd0
> fatal: bad object 280c12ab49223c64c6f914944287a7d049cf4dd0
> $ git show 12323213123 # just to be sure to have a different error
> message for non existing objects.
> fatal: ambiguous argument '12323213123': unknown revision or path not
> in the working tree.

I think 40 hex characters is special cased.  Using CGit as a repository
with a submodule so I can easily get an unrelated SHA1 and short name:

cgit $ git show $(git -C git rev-parse @)
fatal: bad object bb8577532add843833ebf8b5324f94f84cb71ca0
cgit $ git show $(git -C git rev-parse --short @)
fatal: ambiguous argument 'bb85775': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'