Re: bug report: mutual recursion in the git-subtree shell script

From: Colin Stagner <ask+git@howdoi.land>
Date: Mar 14, 2026, 21:36 UTC
Message-ID: <454235b2-139f-40bd-a4ac-fb7664962471@howdoi.land>
In-Reply-To: <CAN7rbOuOaHY553KX1Qcr_XWGG6DFo1yUjdYVu5mn=HYPmOj6vQ@mail.gmail.com>

Arun,

I found your git-subtree bug report from several years ago.

On 3/13/21 10:06, Arun Sharma wrote:

Show 6 quoted lines

> So I'm trying to split out a directory from postgres source code
> (which has 52k commits).
> 
> $ git subtree push --prefix=src/interfaces/libpq libpq master
> /usr/lib/git-core/git-subtree: 647: Maximum function recursion depth
> (1000) reached

On 3/14/21 12:31, Arun Sharma wrote:

Show 11 quoted lines

> I was using ubuntu 20.04.
> 
> $ git --version
> git version 2.25.1
> 
> $ bash --version
> GNU bash, version 5.0.16(1)-release (x86_64-pc-linux-gnu)
> 
> To repro, you can try to split a week old version of:
> 
> https://github.com/postgres/postgres (subtree: src/interfaces/libpq)

Is this issue still relevant to you?

I have prepared a patch series that I hope will correct this problem. If you have the time, can you please test and review:

<https://lore.kernel.org/git/20260305-cs-subtree-split-recursion-v2-0-7266be870ba9@howdoi.land/>

Code reviews are eagerly solicited.

Colin