Re: bug: git fetch reports too many unreachable loose objects

>
> git version 2.19.1
> steps to reproduce:
>
> # start in a brand new repo
> git init
>
> # create lots of unreachable loose objects
> for i in {1..10000}; do git commit-tree -m "$(head -c 12 /dev/urandom
> | base64)" "$(git mktree <&-)" <&-; done
> # this prints a lot of output and takes a minute or so to run
>
> # trigger git gc to run in the background
> git fetch
> # Auto packing the repository in background for optimum performance.
> # See "git help gc" for manual housekeeping.
>
> # trigger it again
> git fetch
> # Auto packing the repository in background for optimum performance.
> # See "git help gc" for manual housekeeping.
> # error: The last gc run reported the following. Please correct the root cause
> # and remove .git/gc.log.
> # Automatic cleanup will not be performed until the file is removed.
> #
> # warning: There are too many unreachable loose objects; run 'git
> prune' to remove them.
>
> # to manually fix this, run git prune:
> git prune
>
> # note that `git gc` does not fix the problem, and appears to do
> nothing in this situation:
> git gc
>
>
> According to the `git fetch` output, the `git help gc` docs, and the
> `git help prune` docs, I don't think I shouldn't ever have to run `git
> prune` manually, so this behavior seems like a bug to me. Please
> correct me if this is expected behavior.