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[104.178.186.189]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-652e472492dsm2461142d50.12.2026.04.16.13.29.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2026 13:29:47 -0700 (PDT) Date: Thu, 16 Apr 2026 16:29:46 -0400 From: Taylor Blau To: Junio C Hamano Cc: Derrick Stolee , Jeff King , git@vger.kernel.org, Johannes Schindelin Subject: Re: MIDX woes, was Re: [ANNOUNCE] Git v2.54.0-rc2 Message-ID: References: <8c1def10-9039-aecd-4ce4-fb4676b47e9b@gmx.de> <20260416051732.GA48541@coredump.intra.peff.net> <20260416053435.GA646718@coredump.intra.peff.net> <621c9da9-2ec0-462d-ae51-0be5e0ca6ab2@gmail.com> Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Thu, Apr 16, 2026 at 09:09:10AM -0700, Junio C Hamano wrote: > > The part that is striking about Johannes' report is that this happens > > on a fetch, so it is being written automatically by normal maintenance > > activities in that case. Without downgrading the default version back > > to a compatible version, deleting the multi-pack-index(es) will not > > keep the repo in a good state. > > I am not sure what you mean by "deleting will not keep the > repository in a good state". Isn't multi-pack-index totall > optional? I am also having trouble following this. Is this saying that fetching from a remote and having a local `git maintenance` (run automatically after `git fetch`) write a v2 MIDX file which is unable to be read by a separate local Git is causing the problem? If so, then I think we are operating in a mixed-version environment where some newer Git that understands the v2 format is writing it, and another older Git version that doesn't is trying to read an unknown version. Though I find it totally plausible that I am wildly misunderstanding what happened for Johannes here, so please let me know if I'm not seeing it. Thanks, Taylor