bug: Segfault with git diff

From: jake roggenbuck <roggenbuckjake@gmail.com>
Date: May 19, 2024, 03:02 UTC
Message-ID: <CAEUC8gmgq_yViedLGHOeSyvR9rQK+O-8Fh9wzds=2+326ngUjw@mail.gmail.com>

> Thank you for filling out a Git bug report!
> Please answer the following questions to help us understand your issue.

I have found a segfault when running git diff.

> What did you do before the bug happened? (Steps to reproduce your issue)

1. After running `git diff`, git showed me that object files were empty.
2. I deleted the empty object files, and ran `git diff` again.
3. I continued deleting the empty files until `git diff` segfaulted.

> What did you expect to happen? (Expected behavior)

An error message of some type or a graceful exit.

> What happened instead? (Actual behavior)

A segmentation fault.

`Segmentation fault (core dumped)`

> What's different between what you expected and what actually happened?

Instead of closing gracefully, there was a segmentation fault.

> Anything else you want to add:

git log displays: fatal: bad object HEAD

git branch displays: fatal: missing object 7610511b1b4db888e8e6bb8d0ff158f932961345 for refs/heads/main

Neither log nor branch causes the segfault.

[System Info] git version: git version 2.45.1 cpu: x86_64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh uname: Linux 6.7.3-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 01 Feb 2024 10:30:35 +0000 x86_64 compiler info: gnuc: 14.1 libc info: glibc: 2.39 $SHELL (typically, interactive shell): /bin/bash

[Enabled Hooks]

Best, Jake Roggenbuck