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 07:17:59 -0700
> Cc: 70973@debbugs.gnu.org
> 
> > If you can reproduce the problem, please tell what does
> > 
> >   ls -l ~/Dropbox/Documents/Projects/emacs/.#dotemacs
> > 
> > produce when you see the warnings
> 
> As follows:
> $ ls -l ~/Dropbox/Documents/Projects/emacs/.#dotemacs
> -rw-r--r--@ 1 username  staff  0 May 16 07:13
> /Users/username/Dropbox/Documents/Projects/emacs/.#dotemacs

Sorry, that doesn't help.  I thought "ls -l" will show the target of
the symlink, but maybe it doesn't on macOS?  In that case, you should
be able to use the Emacs function file-symlink-p: when called with the
lock file as its argument, it should return the target of the symlink
as a string.