pre-commit Error (file exists)

[BlakeFreer]

I regularly get this error with the pre-commit clang format hook

don't commit to branch...................................................Passed
Run git-clang-format.....................................................Failed
- hook id: clang-format
- exit code: 2
- files were modified by this hook

`git read-tree --index-output=.git\clang-format-index --empty` returned 128
fatal: Unable to create 'C:/Formula/repos/racecar/.git/index.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.

What is the cause of this? Has anyone else seen it or can reproduce it? I end up disabling pre-commit since I can't commit with it

[Micnasr]

Hi Blake, I tried reproducing the error but was unsuccessful. It seems to be working fine on my machine. I looked online and it seems that this can happen when you have another git process open like a second commit, or editor window opened by git. There could have been an issue regarding a previous git process which crashed leaving a lock file active. This can be deleted using rm -f .git/index.lock

People also mentioned that I could add the --force parameter to bypass this error.

Could you try to see if this works with the new changes as I cannot get this error.

Thanks