Re: bug report: spurious "cannot delete branch '%s' used by worktree"

>
> [please reply inline rather than top-posting; I've moved your reply
> inline for this response]
>
> On Thu, Mar 28, 2024 at 1:40 PM Tamir Duberstein <tamird@fuseenergy.com> wrote:
> > On Thu, Mar 28, 2024 at 5:24 PM Eric Sunshine <sunshine@sunshineco.com> wrote:
> > > On Thu, Mar 28, 2024 at 10:54 AM Tamir Duberstein <tamird@fuseenergy.com> wrote:
> > > > % git branch -d cleanup
> > > > error: cannot delete branch 'cleanup' used by worktree at '<my source dir>'
> > > > % git worktree list
> > > > <my source dir>  dc46f6d5e [main]
> > > > % git branch
> > > >   cleanup
> > > > * main
> > >
> > > Is this error persistent once it arises? That is, if you invoke `git
> > > branch -d cleanup` again immediately after (or a little while after)
> > > the above sequence, does the problem persist? Or does it "clear up" on
> > > its own at some point?
> >
> > Yes, the problem is persistent. The branch is never deleted.
>
> I'd guess that there may be some sort of "ref" still pointing at the
> "cleanup" branch which presumably was, at some point, checked out at
> "<my source dir>". Digging through the code[1,2,3] suggests that you
> might have some stale state from a rebase, bisect, or other sequencer
> operation which still references the "cleanup" branch.
>
> [Cc'ing Phillip who is probably much more familiar with this code than am I.]
>
> By the way, it's not clear from your initial report what you mean when
> you say "then the remote deleted the branch". Also, did you fetch
> and/or pull from the remote after that?
>
> [1]: https://github.com/git/git/blob/d6fd04375f91/branch.c#L454
> [2]: https://github.com/git/git/blob/d6fd04375f91/branch.c#L386
> [3]: https://github.com/git/git/blob/d6fd04375f91/sequencer.c#L6551