bug#70973: 29.1; "Unlocking file: Invalid argument" Warning saving via a softlink with stale file lock

[Eli Zaretskii]

> From: Duncan Greatwood <dgreatwood@gmail.com>
> Date: Thu, 16 May 2024 08:55:17 -0700
> Cc: 70973@debbugs.gnu.org
> 
> > I thought "ls -l" will show the target of
> > the symlink, but maybe it doesn't on macOS?
> It does indeed do that, even on macOS
> 
> However, it is the .emacs that is a symlink.
> 
> $ ls -l ~/.emacs
> lrwxr-xr-x  1 username  staff  59 Dec  6  2015 .emacs ->
> /Users/username/Dropbox/Documents/Projects/emacs/dotemacs
> 
> The lock file is not a link.

Is that normal on macOS?  Or is that something specific to DropBox?
If you edit a file elsewhere on your system, does Emacs create lock
files that are symlinks?