I've recently started seeing a lot of this message when doing a rebase: warning: could not freshen shared index '/home/ldiamand/git/dev_full/.git/worktrees/gcc8-take-2/sharedindex.0000000000000000000000000000000000000000' (There's a repo called dev_full, and I've got a worktree where I'm working on my 3rd attempt to make it work with gcc8). That file doesn't actually exist but there are a bunch of sharedindex.XXX files in there with more convincing looking names. 2.20.1.611.gfbb209baf1
