docker volume with different permissions causes: integer expression expected

[kierun]

I have the following (weird) set-up: a ./volume/postgresql in my project directory which is owned by a postgres user which is mounted for tests by a PG docker image. When the /data dir is created, I get this:

√ (feat/gorm|+10); ls -l ./volumes/postgresql
drwx------ postgres usr 454 B Wed May  5 09:25:35 2021 data/
git_super_status:[:23: integer expression expected: not
git_super_status:[:23: integer expression expected: could
git_super_status:[:26: integer expression expected: not
git_super_status:[:29: integer expression expected: could
git_super_status:[:35: integer expression expected: open
git_super_status:[:39: integer expression expected: directory
git_super_status:[:43: integer expression expected: 'volumes/postgresql/data/':
git_super_status:[:47: integer expression expected: Permission
git_super_status:[:51: integer expression expected: denied

If I add ./volumes/postgresql/data to .,gitignore, the problem goes away so there is an easy work-around since I do not want the fake database to be in git.