Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue. What did you do before the bug happened? (Steps to reproduce your issue) ```bash git clone --quiet --mirror https://github.com/git/git-merge.git git-merge.git.git git clone --quiet --mirror git-merge.git.git git-merge.git git --git-dir=git-merge.git.git branch test main touch git-merge.git/refs/heads/test.lock git --git-dir=git-merge.git fetch origin --prune --atomic "+refs/*:refs/*" ``` What did you expect to happen? (Expected behavior) Without core dumped. What happened instead? (Actual behavior) ```bash $ git clone --quiet --mirror https://github.com/git/git-merge.git git-merge.git.git $ git clone --quiet --mirror git-merge.git.git git-merge.git $ git --git-dir=git-merge.git.git branch test main branch 'test' set up to track 'origin/main'. $ touch git-merge.git/refs/heads/test.lock $ git --git-dir=git-merge.git fetch origin --prune --atomic "+refs/*:refs/*" From /tmp/git/git-merge.git * [new branch] test -> test error: cannot lock ref 'refs/heads/test': Unable to create '/tmp/git/git-merge.git/refs/heads/test.lock': File exists. Another git process seems to be running in this repository, e.g. an editor opened by 'git commit'. Please make sure all processes are terminated then try again. If it still fails, a git process may have crashed in this repository earlier: remove the file manually to continue. BUG: refs.c:2435: abort called on a closed reference transaction [1] 1298748 IOT instruction (core dumped) git --git-dir=git-merge.git fetch origin --prune --atomic "+refs/*:refs/*" $ ls core.1298748 git-merge.git git-merge.git.git ``` What's different between what you expected and what actually happened? Without core dumped. Anything else you want to add: Please review the rest of the bug report below. You can delete any lines you don't wish to share. [System Info] git version: git version 2.49.0.rc1.120.g683c54c999 cpu: x86_64 built from commit: 683c54c999c301c2cd6f715c411407c413b1d84e sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh libcurl: 7.81.0 OpenSSL: OpenSSL 3.0.2 15 Mar 2022 zlib: 1.2.11 uname: Linux 6.8.0-52-generic #53~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 15 19:18:46 UTC 2 x86_64 compiler info: gnuc: 11.4 libc info: glibc: 2.35 $SHELL (typically, interactive shell): /usr/bin/zsh [Enabled Hooks] not run from a git repository - no hooks to show