Hi.
Trying to delete the branch, I was getting this error:
error: cannot delete branch '<branch_name>' used by worktree at '<wtree_path>'
It wasn't used by that work-tree directly, so I was very confused. It appears this branch had the forgotten bisect.
It would be very good if git can write a more prominent message for such a case, like:
error: cannot delete branch '<branch_name>' because bisect is in progress